One of the discussions we may have with patients prior to a blastocyst transfer is the supposed increased chance of an embryo at the blastocyst stage splitting and becoming an identical twin pregnancy.
In this study in the February 2010 issue of Fertility and Sterility, the authors monitored almost 2000 IVF cycles and found in this group of single-embryo transfers there …
The LA Times article mentioned in the previous post shows the non-signficant difference in success rates between single- and double embryo transfers in a study from Sweden. Most impressive is the reduction in potentially complicated multiple pregnancies by transferring one embryo which should be an incentive for appropriate couples to select this option.
But in most of the U. S., …
An article in the October 29th edition of the Los Angeles Times, “1 in vitro embryo may be best” reports on data from the New England Journal of Medicine that shows by transferring more than one embryo doctors are increasing the odds of having twins, creating a riskier pregnancy for both mother and baby.
Increased risks of twins over a …