Study Confirms Features of Vitrified-Warmed Blastocysts That
The features of vitrified-warmed blastocysts that impacted clinical pregnancy and live birth are elucidated below.

- Transfer of blastocysts developing by day 5 produced higher pregnancy rates than those developing by day 6.

- Multinucleated embryos may produce viable blastocysts, but these blastocysts are less likely to result in live birth.

- Transfer of an expanded blastocyst greatly increases the likelihood of a live birth....