Figure 3.
The menstrual and estrous cycles.
A. The menstrual cycle of women is illustrated schematically. Progest. = progesterone. LH = luteinizing hormone. FSH = follicle stimulating hormone. From (Scharfman and MacLusky 2006).
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.