2Vocabulary- The Hormones Secreted by Pituitary:FSH (Follicle Stimulating Hormone)Stimulates follicle to cause egg to matureLH (Luteinizing Hormone)Causes release of mature ovum (ovulation)Prepares uterus for implantation of fertilized egg
3Vocabulary- The Hormones Secreted by Ovaries:EstrogenCauses uterine lining to thickenProgesterone:Works with estrogen to finish uterine lining thickening
4Vocabulary- The Cycles Ovarian Cycle:Occurs for 28 days in the ovariesProcess during which an ovum matures in a follicle and is released during ovulationAfter ovulation, a corpus luteum (yellow body) is left behind
6Vocabulary- The Cycles Menstrual (Uterine) Cycle:Occurs for 28 daysProcess during which uterine lining is preparing for fertilized ovumIf fertilization occurs, this cycle stops until after birthIf not fertilized, lining sheds (menstruation!) and cycle begins again
10The Beginning and the End: Menstruation Occurs if egg is not fertilizedDays 1- 5Corpus luteum (yellow body) breaks downThis causes drop in estrogen and progesteroneUterine lining shedsFSH increases during
11Phase 2: Follicular Phase Days 5 –13Low estrogen = FSH to be releasedThis stimulates growth of follicleEgg begins to matureFollicle matures causing estrogen levels upUterine lining begins to thicken again
12Phase 3: Ovulation Days 13-15 Sudden rush of FSH Major SPIKE of LH This causes follicle to break and release egg into fallopian tubeFERTILIZATION MOST LIKELY TO OCCUR AT END OF OVULATION!
13Phase 4: Luteal Phase Days 15-28 LH and FSH levels crash Corpus luteum forms from broken follicleCorpus luteum secretes estrogen and progesteroneThis thickens uterine lining to prepare for egg