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Myo-Inositol May Help Prevent OHSS in PCOS

Ovarian hyper-stimulation syndrome (OHSS) is a possible complication of drugs such as gonadotropins - or more rarely clomid - used to stimulate ovulation in IVF and other infertility treatments. Because women with PCOS often have trouble ovulating without ovulation-inducing drugs, they tend be prescribed these medications frequently, and are known to be more likely than other women to experience OHSS as a side-effect.

Ovarian hyper-stimulation can be life-threatening if severe, therefore all forms of help to reduce the severity of this condition should be welcomed. OHSS is typified by high estrogen levels and ovarian swelling and is graded into three levels of severity: mild, moderate and severe. Early warning signs are abdominal pain, abdominal bloating and distention, fullness, nausea, vomiting, diarrhea, slight weight gain, difficulty breathing and enlarged ovaries.

Although very few studies have been done on the use of myo-inositol in IVF, so far it seems to be a promising way to reduce the risks of ovarian hyper-stimulation syndrome (OHSS) in PCOS (polycystic ovarian syndrome) women pursuing IVF.

In a 2009 study (1) sixty infertile PCO women were observed as they underwent ovulation hyper-stimulation for and IVF (in-vitro fertilization) cycle with ICSI (Intra-).

All of the women received a standard 'long protocol' and upon beginning gonadotrophin medication they concurrently received myo-inositol in combination with folic acid in the form of the product Infolic, 2 g twice a day. The control group received folic acid alone with no myo-inositol.

The results of the study showed that the women receiving myo-inositol needed significantly less units of gonadotrophin medication - for less days - during their stimulation phase. The peak estradiol (estrogen) levels were significantly lower in the myo-inositol group at the end of gonadotrophin stimulation, further reducing risks for OHSS.

The number of eggs retrieved in both the treatment and control group were similar but the number of germinal vesicles and degenerated oocytes was greatly reduced in the women who received myo-inositol. Also significant, more oocytes (eggs) were progressing well in metaphase II showing good progression.

This study concluded that:

"These data show that in patients with PCOS, treatment with myo-inositol and folic acid, but not folic acid alone, reduces germinal vesicles and degenerated oocytes at ovum pick-up without compromising total number of retrieved oocytes. This approach, reducing E2 levels at hGC administration, could be adopted to decrease the risk of hyperstimulation in such patients."

Myo-inositol is not the only way to minimize the risks of OHSS; IVF agonist protocols which do not use hCG are known to greatly reduce the risks or OHSS. Whey protein may also help if used in the correct doses at the right time. While you can't always avoid OHSS, you can likely reduce the severity by simple techniques such as these. You should always ask your physician before beginning a new nutritional supplement regime.

This article is for purely informational purposes and in not intended to diagnose or replace medical or nutritional advice for which you should consult a physician or dietitian.

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(1) Fertility and Sterility Vol 91 Pages 1750-1754 (May 2009) Myo-inositol may improve oocyte quality in intracytoplasmic sperm injection cycles. A prospective, controlled, randomized trial. Enrico Papaleo, M.D., et al.

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Content copyright © 2015 by Hannah Calef. All rights reserved.
This content was written by Hannah Calef. If you wish to use this content in any manner, you need written permission. Contact Hannah Calef for details.


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