Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Additional file 2: Hatch process of fertilized embryos in vitro. Fertilized embryos started hatching in 72 h and then spent about 42 h emerging from it gradually and slowly until completely hatched in 120 h. (MP4 1099 kb)
