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.
Forest plots of studies “no corpus luteum” according to the route of progesterone administration for (A) ongoing pregnancy and (B) live birth. Risk of bias legend: 1, confounding; B, selection of patients; C, classification of intervention; D, deviations from intervention; E, missing data; F, measurement of outcome; G, selection of reported results.
