Single Embryo Transfer Best – DUH!

by Jennifer Lahl, CBC President on October 31, 2009


A piece just out in the LATimes (although the concept is not new) addresses the practice of only transferring a single embryo into the mother’s womb when carrying out IVF.

The author writes,
data published in today’s edition of the New England Journal of Medicine show that what they’re really doing is increasing their odds of having twins — which is riskier for the mother and babies alike.”

This should be of no big surprise as we know that by design, a woman’s body is best suited for one baby at a time and not litters. And even a twin pregnancy naturally places the pregnant mother into a ‘high risk’ category for her health as well as the health of the babies she is carrying.
Here’s some data:

A team of Swedish researchers is trying to assess the optimum number of embryos to transfer. In their study of 661 IVF patients, 331 women got two embryos, and 142 of them (or 43%) had live births. The other 330 women got a single embryo, and if that didn’t work, they made a second attempt. Of these women, 128 (or 39%) had live births.


The difference between 43% and 39% wasn’t statistically significant. But one-third of the patients in the double-embryo group had twins or triplets, compared with only 1% in the single-embryo group. Those results were published in 2004. Researchers continued to follow the 661 patients. Their conclusion, in the latest issue of the journal: There’s little downside and plenty of upside to transferring one embryo at a time instead of two.”


What do you think? Make sense to you?



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