Is Fertility Determined by Your Bones?

Ladies … if you are considering a partner to have a child with, check his bone structure!

Intriguingly a new study by researchers at Columbia University Medical Center provides the first evidence that the skeleton is a regulator of reproduction.

Lead researcher Dr Gerard Karsenty and his team have unveiled that the skeleton acts as a regulator of fertility in male mice through a hormone released by bone – osteocalcin.

Until now, interactions between bone and the reproductive system have focused only on the influence of gonads (testes in men, ovaries in women) on the build-up of bone mass.

“Since communication between two organs in the body is rarely one-way, the fact that the gonads regulate bone really begs the question: Does bone regulate the gonads?” said Dr Karsenty.

Of Mice and Men …

Dr Karsenty and his team first noticed that male mice whose skeletons did not secrete osteocalcin were poor breeders.

They then carried out several experiments that show osteocalcin enhances the production of testosterone, a sex steroid hormone that controls male fertility.

As the team added osteocalcin to mice cells that in the human body produce testosterone, its synthesis increased. Similarly, when they injected osteocalcin into male mice, levels of testosterone also went up.

Conversely, when osteocalcin was not present, testosterone levels dropped. This caused a decline in sperm count. As a result, when osteocalcin-deficient male mice were bred with normal female mice, the pairs only produced half the number of litters as did pairs with normal males, along with a decrease in the number of pups per litter.

Now the findings have not yet been confirmed in humans, but Dr Karsenty expects to find similar characteristics in humans, due to other similarities between mouse and human hormones.

If osteocalcin also promotes testosterone production in men, low osteocalcin levels may be the reason why some infertile men have unexplained low levels of testosterone.

Skeleton Regulates Male Fertility, But Not Female

Remarkably, although the new findings stemmed from an observation about estrogen and bone mass, the researchers could not find any evidence that the skeleton influences female reproduction, even though estrogen is one of the most powerful hormones that control bone.

For example, when ovaries stop producing estrogen in women after menopause, bone mass rapidly declines and can lead to osteoporosis.

Sex hormones – estrogen in women and testosterone in men – have been known to affect skeletal growth, but until now, studies of the interaction between bone and the reproductive system have focused only on how sex hormones affect the skeleton.

“We do not know why the skeleton regulates male fertility, and not female. However, if you want to propagate the species, it’s probably easier to do this by facilitating the reproductive ability of males,” said Dr Karsenty. “This is the only rationale I can think of to explain why osteocalcin regulates reproduction in male and not in female mice.”

Conclusion

Personally I found this latest research quite fascinating, in particular the different findings and impact on male and female fertility for seemingly the same biological process.

It is yet another example of how you can marginally increase your odds of getting pregnant by paying attention to a seemingly insignificant detail.

Of course there is a world of difference between the world of mice and men, but if further studies confirm these initial findings in humans it could be a telling factor as to why you can’t get pregnant.

(This post was sent to subscribers in a weekly newsletter on February 23 2011).

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THE Key Factor for IVF Treatment

Considering in-vitro fertilization (IVF) treatment as a solution to
your infertility?

Then you need to know what a new study considers as THE most important
factor if you want to be successful and give birth to a healthy child
with normal birth weight.

And the key factor is … a healthy uterus is more important than the
quality of your eggs.

Healthy Uterus or Good Egg Quality?

The study was extremely thorough. It reviewed three years of data of
more than 300,000 IVF cycles which produced more than 70,000 single
pregnancies (a strike rate of less than one in four).

It compared average birth weight and gestational time for single
births born as a result of three different procedures:

  • standard IVF in which the patient carried the embryo created
  • with her own egg
  • IVF with donor eggs
  • IVF with a surrogate

The findings are really interesting.

While the ability to achieve pregnancy is linked to the quality of
the embryo, the obstetrical outcomes (that is, the birth weight and
actual time period of a pregnancy) are more significantly tied to the
uterine environment affected by a woman’s cause of infertility.

It revealed the birth weight of infants born with standard IVF was
greater than that of newborns created with donor egg cycles, and less
than that in gestational carrier cycles. The results held true even
when other factors were considered showing that the woman’s own uterus
may be a determining factor.

Is Your Man to Blame?

The answer would appear to be … NO!

One of the doctors who conducted the study, a professor of obstetrics
and gynecology, Dr William Gibbons, said the study also determined
that a diagnosis of male infertility did not affect birth weight or
gestational age. However, every female infertility diagnosis was
associated with lower birth weight and a reduced gestational age.

The research was undertaken because women diagnosed with a uterine
health issue, such as fibroids or other factors, give birth to babies
with the lowest birth weights and gestational ages. This led the
researchers to examine the uterine environment as it relates to the
type of therapy being considered.

Why a Healthy Uterus is Key

Dr Gibbons explained that in standard IVF, an embryo is transferred
to a woman who has just undergone controlled ovarian hyperstimulation,
while in donor egg IVF and gestational carrier IVF, the embryo is
transferred to a “natural” or unstimulated uterus.

The study looked at IVF utilizing frozen embryo transfer in which an
embryo created with a patient’s own egg is transferred to her own
unstimulated uterus. It found babies born of frozen embryo transfer
cycles had markedly greater birth weights than those born as a result
of standard IVF.

This is the first time a study has demonstrated that the health of a
women’s uterus is a key determinant for a fetus to obtain normal birth
weight and normal length of gestation.

“The findings may help women seeking pregnancy and their physicians
to consider frozen embryo transfer as a possible option if the uterine
health is not a consideration,” said Dr Gibbons. “This study shows
us how so many factors are related to a successful outcome and we
continue to learn where further research may be needed.”

He added “While obvious issues of uterine fibroids or conditions that
alter the shape of the uterus are suspected to affect pregnancy rates,
conditions that result in poorer ovarian function to the point of
needing donor eggs are not known. Further research is needed to fully
understand this complex issue.”

Conclusion

Assisted reproductive technology (ART) in the United States is still
in its infancy.

Only around one percent of U.S. births result from ART therapies such
as IVF, donor eggs, intracytoplasmic sperm injection, embryo
cryopreservation, embryo donation, pre-implanation genetic diagnosis,
and male infertility surgery and medical therapy.

For this reason, ART benefit from studies such as this as a way to
discover what works best and what doesn’t.

In particular, as in this study, increasing attention is focused not
just on pregnancy rates but also to the obstetrical outcomes of those
resulting pregnancies – that is, the newborn’s birth weight, health
and gestational age.

Once again, as ever in my weekly tips to you, if IVF is an option you
are considering take on board the findings of this study. Knowing this
information and how best to apply it may give you that infinitesimal
edge that can make all the difference in achieving a successful
pregnancy … or not.

(This post was sent to subscribers in a weekly newsletter on February 16 2011).

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How Male Subfertility Impacts on YOU!

Last week’s e-letter shockingly revealed the anti-oxidants commonly found in face cream as well as food and drink may cause female fertility problems.

So THIS week’s e-letter may cause you some confusion. Because now I’m going to tell you … those very same anti-oxidants taken by men can IMPROVE a couple’s chances of conceiving!

Let me explain …

Be Alert to Male Subfertility

As a woman you probably know how sensitive men are about their ‘masculinity’ and ‘virility’. Men often confuse low fertility with poor virility. The two are not the same, but because of this confusion men don’t always seek out the help they need – and YOU as a woman trying to get pregnant also needs.

A man can be extremely virile and perform well in the bedroom.

BUT … he may have a low sperm count which is also known as male subfertility. It’s a condition that affects one in 20 men.

What is Male Subfertility?

As mentioned last week, chemicals called reactive oxygen species (ROS) cause damage to cells. For men ROS can damage sperm cells. This can result in lowered sperm counts and interfere with a man’s ability to fertilise your eggs.

The damage caused by ROS can be reduced by taking antioxidants. These can be natural or synthetic chemicals, including certain vitamins and minerals.

How Antioxidants Combat Male Subfertility

A recent review of a number of studies discovered antioxidant supplements may benefit couples having difficulty conceiving naturally. The review suggests the partners of men who take antioxidants are more likely to get pregnant.

The review focused on 34 trials involving 2,876 couples undergoing assisted reproductive techniques such as in vitro fertilisation and sperm injections. Most men in the trials had low sperm counts or low sperm motility. The trials explored the use of many different types of oral antioxidants, including vitamin E, L-carnitine, zinc and magnesium.

Compared to controls, a couple was more likely to have a pregnancy or live birth if the man took antioxidants. Although the study group sizes were small, the effects of antioxidants on sperm motility and concentration showed mostly positive benefits.

The lead researcher of the review, Marian Showell of the Obstetrics and Gynaecology Department at the University of Auckland in Auckland, New Zealand, acknowledged the conclusions are currently based on limited evidence, but added:

“When trying to conceive as part of an assisted reproductive program, it may be advisable to encourage men to take oral antioxidant supplements to improve their partners’ chances of becoming pregnant.

“Whilst there is not enough data comparing different antioxidants to reach any definite conclusions about the relative effectiveness of supplements and more head-to-comparisons are necessary to understand whether any one antioxidant is performing better than any other, the early evidence is encouraging.”

Conclusions

Two things to consider … what is good for the goose may not be good for the gander!

As I mentioned last week, antioxidants can possibly impact negatively on a woman’s ability to conceive, whereas this week I am telling you the same antioxidants may benefit a man (and thus, a couple’s …) ability to get pregnant.

Be well informed on all aspects of your attempts to get pregnant and understand what is good and bad for both you and your partner.

Secondly, any failure a couple experience in conceiving is not necessarily all down to the woman. I cannot stress enough how important it is that BOTH of you are tested and evaluated for your ability to give birth.

Unfortunately, as mentioned here, for some men that can be wrongly interpreted as an affront to their masculinity and virility. In that case you need to help educate them that male virility and male subfertility are NOT the same thing.

(This post was sent to subscribers in a weekly newsletter on February 9 2011).

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Is Your Skin Cream Making You Infertile?

It is a very rare woman who doesn’t apply skin cream to freshen up the face, keep your skin moist and to (hopefully!) help keep those wrinkles at bay.

No harm in a bit of self-pampering and vanity, right? WRONG!

Recent research has shockingly revealed the antioxidants commonly found in face cream as well as food and drink may cause female fertility problems.

Vitamins C and E NOT So Benevolent

Common anti-oxidants include vitamins you may have always considered benevolent – vitamins C and E. They help eliminate molecules called reactive oxygen species (ROS) that are produced naturally in the body.

Stress can cause these chemically active molecules to be overproduced. And if they are produced in large amounts they can damage cells indiscriminately. Now it has long been believed that by neutralizing these potentially harmful ROS, antioxidants help improve health and slow down the aging process. Thus their common usage in face cream, food and drink.

However, new research by Professor Nava Dekel of the U.S. Biological Regulation Department has revealed a possible unexpected side effect of antioxidants: female infertility.

Anti-oxidants Suppress Ovulation

During her research Dekel applied anti-oxidants to the ovaries of female mice. The results surprised her: ovulation levels dropped dramatically. Very few eggs were released from the ovarian follicles to reach the site of fertilization compared to those in untreated ovaries.

Dekel and her team further wondered if the process of ovulation actually relied on the (assumed) very ‘harmful’ substances destroyed by antioxidants, the ROS.

Shockingly, further tests revealed just that.

In one experiment, Dekel treated some ovarian follicles with luteinizing hormone (the physiological trigger for ovulation) and others with hydrogen peroxide (a ROS). The results showed hydrogen peroxide fully imitated the effect of the ovulation-inducing hormone.

This implies that ROS produced in response to luteinizing hormone serve, in turn, as mediators for the physiological stimulus that leads to ovulation.

Be Wary of Anti-Inflammatory Products

These results add further weight to an emerging belief about fertility and conception, in which it appears that these processes share a number of common mechanisms with inflammation.

As Dr Dekel explained: “Substances which prevent inflammation in other parts of the body might also get in the way of normal ovulation, and so more caution should be taken when administering such substances.

“On the one hand, these findings could prove useful to women who are having trouble getting pregnant. On the other, further studies might show that certain antioxidants might be effective means of birth control that could be safer than today’s hormone-based prevention.”

Dekel intends to investigate further the exact mechanics of this step in ovulation by collecting data on the possible link between females being administered antioxidant supplements and the difficulty to conceive.

My opinion? This is a startling revelation and should be taken seriously. It’s another example of taking time out to read the label of ingredients of anything you eat, drink or indeed put in or on your body.

(This post was sent to subscribers in a weekly newsletter on February 2 2011).

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Are You Vulnerable to Early Menopause?

As a regular reader to my weekly Increase Fertility Tips eletter, you will know I recently lost my mother.

As you will also know, I haven’t posted a weekly eletter for a couple of months as a direct result of that. The loss of my mother hit me hard, all the more so just ahead of the holiday period.

I still miss her so much, but, as she herself would have told me, life goes on … so, I’m back in the saddle and sending you my first eletter of the New Year.

Thank you all for your continued loyalty, all the more so if you were one of the many people who were kind and compassionate enough to take time out and send me a personal message of condolence.

It truly, truly touched me the kindness so many of you showed me.

Know Your Reproductive Lifespan

But now … to business. How valuable do you think it could be to you if you knew what your likely reproductive lifespan was?

Think about that. Today many couples delay starting a family until they are financially secure, both preferring to work instead. But what if by working you are sacrificing your most fertile years and the sands of time on your chances of getting pregnant were rapidly diminishing with each passing year?

Recent research could help you discover if you have a genetic predisposition to early menopause. This in turn can predict the time limit of your reproductive life. Armed with this information, you could then make better informed family planning decisions.

Early Menopause – The Stats

With early menopause affecting as many as one in 20 women in western countries this is a study you cannot ignore.

Scientists at the University of Exeter Peninsula Medical School and The Institute of Cancer Research (ICR) tested four genes associated with the menopause. The four genes each affect risk of early menopause. In combination, they have a larger impact. This helps explain why some women experience early menopause.

The study compared 2,000 women from the Breakthrough Generations Study who had experienced early menopause with a matched group of the same number. The Breakthrough Generations Study is studying the causes of breast cancer and will follow the 100,000 UK women participants for the next 40 years to unravel the lifestyle, environmental and genetic factors that cause the disease.

Early Menopause – The Good and Bad News

This is relevant to women with fertility issues. It’s not all bad news about early menopause. It can result in a decreased risk of breast cancer. However, women who experience early menopause are susceptible to other health problems including osteoporosis, cardiovascular disease and … a reduction in fertility.

The head scientist from the research, Dr Anna Murray, says, “It is estimated that a woman’s ability to conceive decreases on average ten years before she starts the menopause. Therefore, those who are destined to have an early menopause and delay childbearing until their 30s are more likely to have problems conceiving.”

It is hoped the research can lead to an easy and relatively inexpensive genetic test which could help women who may be affected by early menopause and the resultant health issues.

What can you do now to discover if you are susceptible to an early menopause?

Check with other females in your biological family and ask if they experienced an early menopause. If they did, the chances are you are genetically vulnerable to also having an early menopause … and that could have serious consequences on your chances of conceiving later in life in you are delaying starting the family you so desire.

(This post was sent to subscribers in a weekly newsletter on January 26 2011).

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My Mother

You may have noticed I haven’t posted a weekly letter for a month. Sadly, there is a very good reason for that.

In mid-November I traveled to England expecting to attend and celebrate the baptism of a new life – a great grand daughter for my mother.

Instead, on arrival at the airport I was told my mother had been taken into hospital during my flight . I went immediately to the hospital with my father.

For two or three days she appeared to be recovering, but then there was rapid deterioration. For the final six days my father and I were constantly by her side, sleeping in the same private ward with her.

We were with her in the end when she quietly, peacefully, slipped out of this world.

Naturally, the final days caring for my mother and being attentive to my distraught father took up all of my time.

I have good moments – life has to carry on. All the more so when you have your own young daughter to care for as I do.

But the loss of your mother … well … it is what we women, particularly those who struggle to conceive in the first place, mostly strive to be: a mother.

My own mother – and there is no embellishment, no exaggeration, no over-sentimental hype here – was the sweetest, most caring, attentive and loving mother, grandmother and great grandmother it is possible to imagine.

The love and affection ALL her family held her in until the end was a privilege to share and behold.

We celebrated her life in a beautiful ceremony and all of us have a million and one happy memories of her.

But … she’s gone. And there is nothing and no-one that will ever fill the hole she has left in my and my family’s life.

Never forget just how precious a life is, young or old.

Because I have just been reminded of that very fact.

As always, my very fondest wishes to you.

(This post was sent to subscribers in a weekly newsletter on December 16 2010)

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Home Fertility Test – A Waste of Money?

Have you used a Home Fertility Test to check your chances of getting pregnant?

If so, you may well be wasting your money and you might as well throw the home fertility test in the trash can!

But don’t despair just yet … this may in fact be GOOD news for you.

Why is that? Well, a new research by the University of North Carolina at Chapel Hill School of Medicine suggests such self-administered tests may show you are less fertile than you actually are.

But first, a brief explanation of what is a Home Fertility Test.

What is a Home Fertility Test?

Because many women now wait until later in life to start a family, there has been an increased demand for a simple ‘pee stick’ or ‘blood draw’ test that can predict how many reproductive years a woman has left.

Since a major cause of reproductive aging is the aging of the ovary, most of the focus has been on looking at markers of ovarian aging as a potential fertility test.

Now two causes of ovarian aging are follicle stimulating hormone (FSH which helps stimulate the growth of eggs) and antimullerian hormone (AMH which controls the growth of egg follicles).

Whilst levels of FSH have been proven to predict the timing of menopause and the probability of conceiving following assisted reproductive technology, it is not clear if they can also predict natural fertility (or infertility) in the general population.

The Latest Research

To explore this more, researchers studied 100 women who were trying to conceive but who were at risk of reproductive aging – that is, between 30 and 45.

The women used home testing kits that use chemically treated strips (pee sticks) that react to FSH found in urine as a means to gauge their chances of getting pregnant.

Readings above a certain level are supposed to indicate a woman might have trouble conceiving. However, the study found that abnormal levels of FSH did not correlate with reduced chances of becoming pregnant.

Indeed, the cut-off levels used by many fertility tests which label women as infertile may be set to high. As many as 25% of the women had abnormal FSH levels and were considered ‘infertile’ by the suggested home fertility test grading system.

Pretty despairing statistics, huh? BUT! When the researchers followed these ‘infertile’ women for six months they found that they did not have more difficulty getting pregnant than the other women in the study.

So … it’s not ALL gloom and despondency if you get a negative fertility rating using a home fertility test.

The Research Findings

As ever with any such studies, it is always best to lean on the side of caution with regard to the findings of such a small sample.

This is acknowledged by the study’s lead researcher Dr Anne Steiner who said tests on larger numbers of women are necessary to quantify the number of women who do conceive within one year of having a home test which suggest they have fertility issues.

Dr Steiner added: “That is not to say that these tests are useless, but they certainly warrant further investigation. Our findings may mean that we need to go back to the drawing board and change the potential cut-off for infertility in the current tests, or perhaps we need to explore other tests altogether.”

“So it may be that this test can pinpoint infertility, but we need to uniquely define where that cut-off is going to be. Hopefully we can find a better way of predicting infertility so we can provide women with more reproductive control,” she concluded.

The study also suggests that AMH could potentially be a much better predictor of infertility. Unlike FSH, AMH cannot be gauged using a pee stick but only be through a blood test.

The study – called ‘Time to Conceive’ – continues to enroll women into the program. Eventually, it will follow a total of 750 women for up to twelve months to further confirm its findings.

So if you’ve recently tried a home fertility test and got a negative reading back, don’t despair just yet. There’s hope for you yet …

(This post was sent to subscribers in a weekly newsletter on November 10 2010. Sign up to the free 30-part Increase Fertility Tips Mini-Course to be sure to receive YOUR weekly newsletter, direct to your mail box).

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Freeze Your Ovaries to Get Pregnant!

You know a great deal of planning and fore-thought goes into getting pregnant, right?   And that planning and fore-thought takes on extra meaning for women with fertility issues.

But … how seriously do you take a recent suggestion from a leading reproductive surgeon who says women in their twenties should freeze parts of their ovaries so they can have children later in life?

Pretty radical, don’t you think?

Well Dr Sherman Silber, who carried out the world’s first full ovary transplant, says the controversial procedure is so successful at producing babies it is far more effective than IVF and could help millions of women delay having children until they have fulfilled their career ambitions and are ready to settle down.

The Procedure

So just what does it entail?

Well … one third of a woman’s ovary can be ‘banked’. This would capture about 60,000 eggs which could be frozen, stored and transplanted back when the woman is older and wants a baby.

The rest of the ovary would remain intact so women could still conceive naturally.

Storing parts of the ovary and putting thousands of eggs on ice increases a woman’s chances of conceiving later in life.

Dr Silber goes a step further and urges women in their 20s to take the step now. By doing so Dr Silber said: “With just one procedure a woman could freeze her ovary aged 19 and have a 19-year-old ovary when she is 40.”

The procedure takes a couple of hours under general anesthetic. By removing a third of one of a woman’s two ovaries she is left with just over 80 per cent of her total ovarian tissue.

This means that even if she was to change her mind a few months later and decide to try for children immediately she would still have hundreds of thousands of eggs.

The operation to put the thawed tissue back into the ovaries is similar to a skin graft.

The Rationale behind the Treatment

In addressing the American Society for Reproductive Medicine conference in Denver Dr Silber said women should give this serious consideration before reaching 30.

He said with many young women putting off marriage and children until much later in their lives because of their careers they should plan ahead now.

Dr Silber added conventional egg freezing can only retrieve five to ten eggs per cycle, greatly reducing the odds of storing and retrieving viable eggs compared to his innovative system.

Interestingly, Dr Silbert has used this procedure on cancer patients who receive the treatment before they have chemotherapy. This way they can protect part of the ovary and eggs which could otherwise suffer from the chemotherapy.

In those patients without cancer he has treated using the procedure there has been a 100 per cent success rate, compared to a one in three chance of conception using IVF.

The Cost

Dr Silber’s US clinic offers ovary-freezing surgery for around $3,000 with reinsertion costing about $10,000.

Moral and Biological Questions

On the one hand it sounds intriguing, but isn’t there a risk here that children are seen as little more than ‘consumer goods’, made to order at a time convenient to the parents?

Norman Wells of the Family and Youth Concern Group in the UK certainly thinks so. He said: “Dr Silber seems to have lost sight of the fact that a woman’s childbearing years are limited for good reason.

“As a society we have given motherhood a lower status than having a career. The result is large numbers of women are consciously choosing to devote their most energetic years to work outside the home rather than to bearing and raising children.

“All too often children are regarded as consumer goods to be fitted in when it is most convenient for their mothers’ careers, rather than as gifts to be loved and cherished.”

Tony Rutherford, chairman of the British Fertility Society, also had some reservations, saying it was too early to recommend widespread banking of ovarian tissue. “We need to see clearer evidence of its effectiveness.”

Conclusion

It is certainly an intriguing – albeit controversial – procedure.

Personally, I am uneasy at the ethics and morality of it all and the idea you can have a baby to order at a time convenient to you.

As Norman Wells commented, a woman’s child-bearing years are limited for a good reason and there is a danger here that this procedure goes against the natural order of things.

That said, although the procedure is open to abuse and manipulation for less than honorable reasons, the motivation, desire and instinct for women to have a child is overwhelming and it is hard – cruel even – to say out and out that it is morally wrong.

My remaining problem with it is … if you are already experiencing infertility in your 20s when you are supposedly most fertile, what is to be gained by freezing your eggs and trying again 15-20 years later when your body is probably even less well tuned to conceive naturally?

I think I’ll file this one under ‘interesting’, but ‘dubious’ for couples experiencing fertility issues.

What do YOU think?

(This post was sent to subscribers in a weekly newsletter on November 3 2010. Sign up to the free 30-part Increase Fertility Tips Mini-Course to be sure to receive YOUR weekly newsletter, direct to your mail box).

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Blood Type and Fertility

So … do you know what blood type you have? Because there is strong evidence of a link between your blood type and fertility which could determine your chances of getting pregnant.

And if your blood type is O it could signal bad news for you, whereas it is better news for women with blood type A.

Now I’m sure many of you know a woman’s age is an extremely important factor in determining her chances of conceiving or not. But why should your blood type impact negatively on your fertility and further sabotage your prospects of getting pregnant?

Let’s take a closer look at a recently concluded research which tested 560 women seeking fertility treatment with an average age of just under 35 in an attempt to discover a link between blood type and fertility.

The Link Between Blood Type and Fertility

Now although type O and A are the two most common blood groups (depending on location both can average between 35-45 percent of a nation’s population), type O women seem to have a lower egg count and poorer egg quality than other blood types. By contrast those with blood type A appear to have more and better quality eggs.

Why is this? Well … the research revealed women with blood type O were more likely to have higher levels of ‘follicle stimulating hormone’ (FSH) than those with type A.

And what exactly are the implications of that? Fertility experts consider a high FSH level is a key indicator of having a low egg count. The condition is also known as ‘diminished ovarian reserve’.

FSH is naturally produced by the body to stimulate the follicles in the ovaries which produce eggs. As a woman’s ovaries run out of eggs in her 30s and 40s, production is increased to encourage more follicles to be made.

The study discovered blood type O women were twice as likely to have an FSH level above 10 as women in any other blood group. This figure is commonly regarded as the threshold between normal and raised levels.

Why ‘A’ is Better Than ‘O’

But why are blood group A types immune from the effect of diminished ovarian reserve? Interestingly, it is because they carry the A antigen – a protein on the surface of the cell – which is absent in women with O blood type. And this is sufficient to protect them from diminished ovarian reserve.

Whilst the research did not quantify how much more difficult it is for women with blood type O to conceive, the findings could result in women with type O blood being advised to try for a baby earlier.

What Fertility Experts Say

Dr Edward Nejat of the Albert Einstein College of Medicine in New York was the lead author of the research, based on women undergoing fertility treatment at the Yale University IVF programme and the Montefiore Institute in New York.

Dr Nejat said this was the first time a potential link between blood type and fertility had been identified. He added: “Those with blood type O were twice as likely to have an FSH level over 10 than those with blood types other than O.”

Whilst other fertility experts welcome the findings, they are still urging caution.

Susan Seenan, of Infertility Network UK, commented: “Anything which helps couples avoid having to have fertility treatment has got to be good news. If they know there is a possibility they might have a fertility problem then perhaps they can address the issue earlier.”

She added the proviso that more studies should be done before advising blood group O women to try for a baby earlier.

Tony Rutherford of the British Fertility Society echoed those sentiments, describing the research as “interesting” in showing “a potential link” between blood type and fertility, but also saying a larger study needed to be carried out among the general population and not just those who had gone for help with fertility problems.

“We need to look at a prospective group of women to see if blood group affects your chance of getting pregnant,” he said.

He also said the link between blood group and other hormones that were better predictors of fertility needed to be examined.

Conclusions About Blood Type and Fertility

In conclusion, if you are blood type A and in your late 30s or older, don’t despair just yet. This was a very small sample and cannot be considered conclusive.

That said, you cannot totally ignore certain facts. Age for example is the most important determinant of ovarian reserve, which tends to start dropping in the early 30s and then accelerate in the late 30s and 40s. Being obese is also known to affect the number and quality of eggs.

But being aware of how your blood type and fertility are linked – and of other issues – can only help you when trying to get pregnant. Keep yourself informed of all the positive steps you can take to overcome any fertility difficulties you have.

(This post was sent to subscribers in a weekly newsletter on October 28 2010. Sign up to the free 30-part Increase Fertility Tips Mini-Course to be sure to receive YOUR weekly newsletter, direct to your mail box).

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Improve Pregnancy 5-fold

A shocking new report challenging some well established beliefs about the causes of infertility may just blow the science and medical community working on fertility research out of the water.

And if the results in the lab could be replicated for women struggling with infertility it could improve your chances of having a successful pregnancy by five or six-fold!

Let’s take a look at the report and how its findings report may impact directly on your chances of getting pregnant.

Insulin Resistance and Obesity

Now if you’ve made any sort of investigation or research into the cause of infertility you will know that the link between obesity (or simply being slightly overweight) and infertility is well established.

You might further know there is a widely held belief that infertility results from insulin resistance, that your body is insensitive to chronically elevated insulin levels and that insulin resistance is a typical symptom of obesity.

However, a study by the Johns Hopkins Children’s Center may have identified the mechanism that provokes the risk. And it challenges perceived wisdom on the link between insulin resistance, obesity and infertility.

The Importance of Your Pituitary Gland

The center conducted research on mice and found the pituitary gland actively responds to chronically high insulin levels. This triggers a cascade of hormonal changes which in turn disrupt ovarian function and impair fertility.

So what does that all mean for you?

Well … the study (published in the journal Cell Metabolism) argues doctors and scientists have traditionally focused on treating infertility by lowering insulin levels as a way to treat insulin resistance. However, this study suggests decreasing the pituitary’s sensitivity to insulin could be an important new target for treatment instead.

The study’s principal investigator Andrew Wolfe said: “What we propose is a fundamentally new model showing that different tissues respond to obesity differently, and that while cells in the liver and muscle do become insulin resistant, cells in the pituitary remain sensitive to insulin.”

Now insulin resistance occurs in polycystic ovary syndrome (PCOS) which is the most common cause of infertility affecting one in 10 women.   Because ovarian function and fertility are mostly regulated by the pituitary – the body’s master gland – the Hopkins team set out to find out exactly how elevated insulin levels affect the pituitaries of obese women to render them infertile.

They focused on particular pituitary cells called gonadotrophs which secrete luteinizing hormone (LH) which is critical for ovulation and fertility. The researchers believed if the gonadotrophs of obese mice had too much insulin they would start pumping out large amounts of LH which in turn would disrupt ovulation.

To test their hypothesis they engineered mice with missing insulin receptors in their pituitary glands and compared them to mice with intact insulin receptors. After three months on a high-fat diet, the obese mice with intact insulin receptors developed all the classic symptoms of PCOS: elevated LH levels, high testosterone, irregular reproductive cycles and fewer ovulations.

By contrast, the mice with missing insulin receptors maintained near-normal LH levels, regular cycles and normal ovulation despite their obesity.

As a further means to clarify the effect of insulin on the pituitary the researchers compared the gonadotrophs of obese mice to those of lean mice by injecting the animals with gonadotropin-releasing hormone (GnRH). This stimulates LH and is critical for ovulation and fertility.

The results? Lean mice – with and without pituitary insulin receptors – had normal elevations of LH. Obese mice with intact insulin receptors experienced increases of LH twice as high. Yet incredibly, the obese mice with missing insulin receptors in their pituitaries had near-normal LH elevations.

The researches argue the results show the high levels of insulin seen in obesity make the pituitary more sensitive to GnRH and help initiate a hormonal chain-reaction that disrupts fertility.

To further demonstrate insulin’s direct affects on the pituitary they then injected mice with insulin. Mice with intact insulin receptors, lean or obese, had mild LH elevations, while mice with deleted insulin receptors, lean or obese, experienced none.

Astounding Fertility Results

Finally, to determine whether these hormonal differences would carry over into actual differences in fertility, the researchers allowed the mice to mate. The results were nothing short of astounding.

The pregnancy outcomes mirrored the hormonal findings. Lean mice – with or without pituitary insulin receptors – had six times the number of successful pregnancies as obese mice. However, obese mice with missing pituitary insulin receptors had near-normal pregnancy outcomes, with five times more successful pregnancies than obese mice whose pituitary insulin receptors were intact.

By deleting the insulin receptors in the pituitary cells of mice the researchers managed to restore normal LH levels, maintain ovulation and near-intact fertility even in obese mice with elevated insulin levels.

Despite normal hormonal levels and ovulation, the obese mice with missing insulin receptors were not as fertile as lean mice with normal insulin levels. The finding suggests that since the ovaries share partial control of ovulation and fertility with the pituitary, they too may be affected by high insulin levels.

Conclusions

If these kind of results can be replicated among the human populace it may dramatically improve the fertility levels and chances of carrying a pregnancy to full term for thousands of woman for who there had been little or no hope of ever having a child.

(This post was sent to subscribers in a weekly newsletter on October 21 2010. Sign up to the free 30-part Increase Fertility Tips Mini-Course to be sure to receive YOUR weekly newsletter, direct to your mail box).

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