progestin


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Related to progestin: progesterone

progestin

 [pro-jes´tin]
1. progestational agent.
2. a progestational agent secreted by the corpus luteum and stimulating release of proteolytic enzymes in preparation for ovulation and maturation of the endometrium.

pro·ges·tin

(prō-jes'tin),
1. A hormone of the corpus luteum.
2. Generic term for any substance, natural or synthetic, which effects some or all of the biologic changes produced by progesterone.
3. Synonym(s): gestagen
[pro- + gestation + -in]

progestin

/pro·ges·tin/ (-jes´tin) progestational agent.

progestin

(prō-jĕs′tĭn)
n.
Any of several synthetic progestational substances that mimic some or all of the actions of progesterone, used as contraceptives either alone or in combination with estrogen, and with estrogen in hormone replacement therapy.

progestin

[-jes′tin]
1 progesterone.
2 any of a group of hormones, natural or synthetic, secreted by the corpus luteum, placenta, or adrenal cortex that have a progesterone-like effect on the uterine endometrial lining to prepare it for implantation of the blastocyst.

pro·ges·tin

(prō-jes'tin)
1. A hormone of the corpus luteum.
2. Generic term for any substance, natural or synthetic, which effects some or all of the biologic changes produced by progesterone.
Compare: bioregulator
[pro- + gestation + -in]

Progestin

A synthetic or natural drug that acts on the uterine lining.

pro·ges·tin

(prō-jes'tin)
1. Hormone of corpus luteum.
2. Generic term for any substance, natural or synthetic, which effects some or all biologic changes produced by progesterone.
[pro- + gestation + -in]

progestin (prōjes´tin),

n a hormone that suppresses the release of luteinizing hormone and thereby inhibits the onset of menstruation. Synthetically produced progestin and estrogen are used in combination as an effective contraception.

progestin

originally, the crude hormone of the corpus luteum; it has since been isolated in pure form and is now known as progesterone. Certain synthetic and natural progestational agents are called progestins.
References in periodicals archive ?
Estrogens given without progestins have been reported to increase the risk of endometrial carcinoma in postmenopausal women.
They also suggest that estrogen plus progestin may lead to more aggressive disease or mask early symptoms, or HRT users may be less likely to see or receive medical care in a timely fashion.
Furthermore, progestins allow the use of less testosterone and thereby reduce androgen-related side effects.
Natural progesterone (non-micronized) is not effective orally and natural progesterone used in over-the-counter creams is not as effective as progestins or micronized progesterone.
But how the higher dose of progestin elicits more protection is something we really don't know.
The terms progestin and progesterone are often used interchangeably, while in fact the differences between the two are biologically significant.
CombiPatch delivers the progestin norethindrone acetate (NETA)
A So far, results from the Women's Health Initiative find that estrogen, either alone or with progestin, helps decrease the risk of hip fracture and other osteoporotic fractures in women.
In the first study, results from the final analysis of the estrogen plus progestin trial of the Women's Health Initiative (WHI) make one thing clear: estrogen plus progestin does not protect the heart.
NuvaRing: The flexible transparent ring delivering estrogen and progestin is placed in the vagina for three weeks at a time.
I predict the government will find synthetic HRT safe within certain parameters of usage, and that natural hormones, or even estrogen or progestin alone, will not be studied until we hear, once again, that they are causing serious problems.
The National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health (NIH) has stopped early a major clinical trial of the risks and benefits of combined estrogen and progestin in healthy menopausal women due to an increased risk of invasive breast cancer.

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