Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy. It may also be involved in the growth of certain cancers.
I've been following various people's posts about the GRE for 10 months now. Some people don't study at all for the GRE, some study for a weekend, the average is about 2 to 3 months, and some study for a year or more.
Your Guide to Taking the GRE. Every year, nearly take the Graduate Record Examination (GRE) as a requirement for entry into graduate or business school. Administered by the Educational Testing Service (ETS), the GRE exam is designed to test for aptitude for study at the graduate level.