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| peterpilt.org |
A delay in transferring embryos to the mother improves the success of in vitro fertilization in certain cases, according to a study by scientists at the Stanford University School of Medicine, Celmatix Inc. and several other institutions.
Women undergoing IVF who have high levels of the hormone progesterone when their egg cells are retrieved benefit from having the resulting embryos frozen and transferred back to the uterus at a later date, the researchers found.
The study appears in the August issue of Fertility and Sterility. The lead author is Ange Wang, MD, a resident physician in obstetrics and gynecology at Stanford. Several other co-authors, including senior author Piraye Yurttas Beim, PhD, work for Celmatix, a company that makes software and a genetic test to help guide fertility treatments for women.
The IVF process starts with injections of reproductive hormones to stimulate the growth of multiple eggs. The eggs are retrieved and then fertilized in the laboratory. The resulting embryos can be transferred back to the woman's uterus a few days later (a "fresh" transfer) or frozen and then transferred in a subsequent hormonal cycle..."
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