PHAR 100 Lecture Notes - Lecture 20: Corpus Luteum, Progestin, Cervical Canal
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12 Nov 2016
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Ovarian cycle: beginning of cycle several follicles develop in response to fsh, days 5 -6 one follicle develops rapidly, and under lh secretes estrogen, proliferation of endometrium, estrogen inhibits release of fsh (no more follicles), progesterone secretion increases. Fixed dose of hormones daily from day 5 to 25 of cycle. Phasic preps. start with low dose of progestin and increase dose throughout cycle. Transdermal system that delivers about 20 mcg of ethinyl estradiol and 150 mcg/day of norelgestromin. Patch applied for three cycles of 7 days each and use three patches per menstrual cycle or every. Progestin in a silastic tube slow release of drug, contraception for 5 years. Vaginal contraceptive ring copolymer containing estrogen and a progestin constant amount released daily- over 22 days. Note: you never see progesterone without estrogen because it would cause proliferation of the uterine lining leading to potential cancers.
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Related Questions
1. The site of implantation of a fertilized ovum is
A.The uterus |
B.. | The ovaries |
C. | The vag ina |
D. | The cervix |
2. Which statement correctly describes the secretory phase of the uterine (menstrual) cycle?
A. | Follicle stimulating hormone stimulates proliferation of the endometrium |
B. | During this phase, the endometrium detaches and sheds |
C. | Progesterone stimulates the endometrium to prepare for implantation |
D. | Decreased progesterone levels cause the endometrial cells to die |
Which events in the monthly female reproductive cycle occur simultaneously?
A. Menstruation and the estrogen surge |
B. | Endometrial proliferation and development of the vesicular follicle |
C. | Degeneration of the corpus luteum and increased LH and FSH secretion |
D. | The secretory phase in the uterus and decreased progesterone levels |
Please give some explanations, thanks.