This process is called hatching, and it is an important step before the embryo can attach to the uterus and begin a pregnancy. The researchers examined 1150 embryos from women aged 26 to 45 who ...

This study offers new guidance for IVF clinics. Choosing a small hatching embryo may improve the chances of success, especially for women of advanced age and in clinics that do not use PGT-A.

They found that smaller embryos that were already hatching were more likely to be chromosomally normal, also called "euploid." "Of the 1150 blastocysts that underwent PGT-A analysis in this study ...