Look in your textbook, search the Internet or go to the Library. Use these keywords to start your search:

• combination pill
• endometroisis
• estrogen
• Follicle Stimulating Hormone (FSH)
• Gonadal Releasing Hormone (GRH) or Factor (GRF)
• Luteinizing Hormone (LH)
• menstrual cycle
• mini-pill
• progesterone