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.
During week 4, you will finish your preparation for the GRE. You'll review the second of your simulation exams, and, more importantly, you'll do more practice questions and then REVIEW all of the practice questions that you have seen. You'll need to spend at least 6 days in preparing for the GRE, spending upwards of 2 hours each day, for a total of 12 hours. Here is a sample week plan: Day 1: Review the second simulation GRE exam that you took at the end of week #3.