Monozygotic twinning not increased in blastocyst embryo transfer over cleavage stage transfer
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 …