Oral contraceptive pharmacology

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Kathryn A. Szabo, MD; Eric A. Schaff eschaff aol.

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Oral contraceptives OCs mimic ovarian hormones. Once ingested, they inhibit the release of gonadotropin-releasing hormone GnRH by the hypothalamus, thus inhibiting the release of the pituitary hormones that stimulate ovulation. OCs also affect the lining of the uterus and cause the cervical mucus to thicken, making it impervious to sperm.

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Hormonal contraceptives involve the use of estrogen and progestin analogs to prevent pregnancy. The contraceptive effect is mediated by negative feedback at the hypothalamusultimately leading to reduced pituitary follicle stimulating hormone FSH and luteinizing hormone LH secretion. Without an LH surgeovulation does not occur.

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The primary care update series is a new premium content based service from bpac nz Find out more. Oral contraceptive pills are a safe and effective contraceptive method widely used in New Zealand. Progestogen-only contraceptives are a suitable alternative for patients with contraindications to oestrogen use, such as those at high risk of venous thromboembolism.

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Skip to search form Skip to main content. Women's trials: the approval of the first oral contraceptive pill in the United States and Great Britain. L'impact medical, social et politique de la pilule contraceptive orale aux Etats-Unis et en Grande-Bretagne est decrit.

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These images are a random sampling from a Bing search on the term "Oral Contraceptive. Search Bing for all related images. Started inthis collection now contains interlinked topic pages divided into a tree of 31 specialty books and chapters.

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Written by C. Fookes, BPharm on Jul 5, Other names: Birth control What are Contraceptives?

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The combined oral contraceptive pill COCPoften referred to as the birth control pill or colloquially as " the pill ", is a type of birth control that is designed to be taken orally by women. It includes a combination of an estrogen usually ethinylestradiol and a progestogen specifically a progestin. When taken correctly, it alters the menstrual cycle to eliminate ovulation and prevent pregnancy. They were first approved for contraceptive use in the United States inand are a very popular form of birth control.

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In recent years, several new oral contraceptives have become available. In some ways, they represent an evolution in terms of individualization and compliance on the part of women. The new formulations make it increasingly possible to prescribe a specific hormonal contraceptive on an individual basis.

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Use of combined oral contraceptives COCs was approved in the United States in and has become a popular method of contraception. COCs contain two hormones, an estrogen and a progestin synthetic progestogen. They work by inhibiting ovulationby thickening the cervical mucus making it difficult for sperm to enter the uterusand by making the lining of the uterus endometrium thinner.

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