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.
NSValues are presented as mean±standard deviation or number (%).
IVF, in vitro fertilization; ET, embryo transfer; FET, frozen-thawed embryo transfer; GnRH-a, gonadotropin-releasing hormone agonist; FET, frozen-thawed embryo transfer; NS, not significant.
