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.
Embryo biopsy at the four-cell stage. A, under DIC; B, confocal microscopy (stained by Hoechst 33342); C, merged. A single blastomere removed from a four-cell embryo is shown under DIC (D), by confocal microscopy (stained by Hoechst 33342) (E), and merged (F). The biopsied three-cell stage embryo is shown under DIC (G), by confocal microscopy (stained by Hoechst 33342) (H), and merged (I).
