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.
About GRE Test: The GRE revised General Test, introduced in August 2011, has three sections: Verbal Reasoning; Quantitative Reasoning and Analytical Writing. Calculators are allowed. Total test time is 3-hours, not including the research section.