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www.medicinenet.com/oral_contraceptives_birth_control_pills/article.htm

Oral contraceptives (birth control pills) are medications that prevent pregnancy.They are one method of birth control.Oral contraceptives are hormonal preparations that may contain combinations of the hormones estrogen and progestin or progestin alone. Combinations of estrogen and progestin prevent pregnancy by inhibiting the release of the hormones luteinizing hormone (LH) and follicle ...

en.wikipedia.org/wiki/Combined_oral_contraceptive_pill

The combined oral contraceptive pill (COCP), often 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 preve...

www.drugs.com/drug-class/contraceptives.html

Oral hormonal contraceptives: Progestin-only contraceptives. Progestin-only contraceptives (POPs) contain just one hormone, progestin. Most work by thickening cervical mucus, preventing sperm from entering the uterus.

medlineplus.gov/druginfo/meds/a601050.html

Oral contraceptives (birth-control pills) are used to prevent pregnancy. Estrogen and progestin are two female sex hormones. Combinations of estrogen and progestin work by preventing ovulation (the release of eggs from the ovaries).

www.mayoclinic.org/drugs-supplements/estrogen-and-progestin-oral...

Description and Brand Names. Drug information provided by: IBM Micromedex Descriptions. Oral contraceptives are known also as the Pill, OCs, BCs, BC tablets, or birth control pills.

medical-dictionary.thefreedictionary.com/Oral+Contraceptives

Oral Contraceptives Definition Oral contraceptives are medicines taken by mouth to help prevent pregnancy. They are also known as the Pill, OCs, or birth control pills. Purpose Oral contraceptives, also known as birth control pills, contain artificially made forms of two hormones produced naturally in the body. These hormones, estrogen and progestin ...

www.cdc.gov/reproductivehealth/contraception

In choosing a method of contraception, dual protection from the simultaneous risk for HIV and other STDs also should be considered. Although hormonal contraceptives and IUDs are highly effective at preventing pregnancy, they do not protect against STDs, including HIV.

www.webmd.com/sex/birth-control/birth-control-pill

WebMD provides an overview of birth control pills and how they're used to prevent pregnancy.

www.plannedparenthood.org/learn/birth-control/birth-control-pill

How do birth control pills prevent pregnancy? The birth control pill works by stopping sperm from joining with an egg (which is called fertilization).. The hormones in the pill stop ovulation.No ovulation means there’s no egg hanging around for sperm to fertilize, so pregnancy can’t happen.

www.cancer.gov/.../causes-prevention/risk/hormones/oral-contraceptives-fact-sheet

Oral contraceptives (birth control pills) are hormone-containing medications that are taken by mouth to prevent pregnancy. They prevent pregnancy by inhibiting ovulation and also by preventing sperm from penetrating through the cervix.. By far the most commonly prescribed type of oral contraceptive in the United States contains synthetic versions of the natural female hormones estrogen and ...