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12 Cards in this Set
- Front
- Back
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What is mifepristone?
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It is a progesterone antagonist. Once conception has occurred, it can induce abortions.
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What is mifepristone?
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It is a progesterone antagonist. Once conception has occurred, it can induce abortions.
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What is the result of a foriegn body(intentional) in the human uterus?
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They do not alter the menstrual cycle, butact as effective contraceptive devices. It prevents sperm from fertilizing ova.
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What about IUDs containing copper?
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They appear to exert a spermicidal effect.
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What is the result of IUDs that slowly release progesterone or synthetic progestins?
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They thicken cervical mucus so that entry of sperm into the uterus is impeded.
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Woman undergoing long term treatment with large doses of estrogen do not ovulate. TRUE/FALSE
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TRUE. They have depressed FSH levels and multiple irregular bursts of LH secretion rather than a single middle peak.
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Women treated with similar doses of estrogen plus a progestational agent do not ovulate. WHY?
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The secretions of both gonadotropins is suppressed. The progestin makes the cervical mucus thick and unfavorable to sperm migration and may also interfere with implantation.
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What is ethinyl estradiol?
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It is an orally active estrogen, and is often combined with a synthetic progestin such as norethindrone.
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How is ethinyl estradiol used?
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The pills are given for 21 days, then withdrawn for 5-7 days to permit menstrual flow, and then started again.
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Like ethinyl estardiol, norethindrone is effective by mouth . Why?
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It has an ethinyl group on position 17 of the steroid nucleus, so it is resistent to hepatic metabolism.
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Norethindrone is metabolized to ethinyl estradiol. TRUE/FALSE
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TRUE.
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What is levonorgestrel?
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An implant made up primarily of progestins. These are inserted under the skin and can prevent pregnancy for up to 5 years. They often produce amenorrhea.
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