oral contraceptive

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1. diminishing the likelihood of or preventing conception.
2. an agent that does this; see also contraception.
oral contraceptive a compound, usually hormonal, taken orally in order to block ovulation and prevent the occurrence of pregnancy. See also contraception.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

or·al con·tra·cep·tive (OC),

any orally effective preparation designed to prevent conception.
Farlex Partner Medical Dictionary © Farlex 2012

oral contraceptive

Any of various pills containing estrogen and a progestin, or a progestin alone, that inhibit ovulation and are used to prevent conception. Also called birth control pill.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

oral contraceptive

Gynecology A preparation of synthetic hormones intended to make a ♀ inconceivable by inhibiting ovulation OC formats Sequential method, combined method. See Biphasic contraceptive, Contraceptives, Monophase contraceptive, Third-generation contraceptive, Triphasic contraceptive.
Oral contraceptives, contraindications
Age–over 35
Breast CA or other estrogen-dependent malignancy
Breast-feeding and < 6 weeks after delivery
Cardiovascular defects–acute MI, ASHD, CVA/TIA
Circulatory defects–varicose veins, phlebitis
Cystic fibrosis
Diabetes and long-term OC use
Liver disease–hepatitis, CA, neoplasms
Obesity–BMI > 30
Pregnancy–current, suspected, or recently ended
Sickle-cell disease
Smoking–especially > 1 pack/day
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

or·al con·tra·cep·tive

(OC) (ōr'ăl kon'tră-sep'tiv)
A medication taken by mouth designed to prevent conception.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

oral contraceptive

A drug or combination of drugs taken by mouth for the purpose of preventing pregnancy. Most oral contraceptives must be taken by women. They contain oestrogens and/or PROGESTOGENS and act by preventing the ovaries from producing eggs (ova). They also have some effect in making the lining of the womb less suitable for implantation of the ovum and may make the mucus in the canal of the cervix less easily passable by sperms. Oral contraceptives are second after sterilization in effectiveness in avoiding pregnancy. Risk attributable to oral contraceptives is very small among non-smokers but there are certain categories, notably women with thrombophilia from genetic mutations, in which the risk is slightly increased. The increased risk of breast cancer has been greatly exaggerated. It amounts to no more than roughly 1 additional case per 20,000 women. Also known as ‘the pill’. See also CONTRACEPTION.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
The advertising targets young teens like birth control pills are an accessory, like it's the same as any other thing you would find in a young woman's bedroom or purse."
Unlike forms of birth control sold over the counter, you need a health care professional's prescription to purchase birth control pills, and many health insurers cover their cost.
Some studies have shown that it's possible that bone density improves while taking birth control pills. However, it has not been shown that BCPs make a difference in reducing bone fractures.
Levels of contraceptive knowledge among women at risk of pregnancy were high: Eighty-nine percent of these women correctly answered all three questions asked about birth control pills (who should take them, why and how often), and 93% correctly answered the same questions about condoms.
Continuous progestins in combination birth control pills also prevent the growth of the endometrium and alter uterine secretions to reduce the chance that a fertilized egg could implant in the uterine lining.
Healthcare professionals and patients are advised to balance the potential risks of increased estrogen exposure with Ortho Evra against the chance of pregnancy if a birth control pill is not taken daily.
It was only after the widespread distribution of birth control pills in the 1960s that sexuality, household formation, and marriage all became separated from each other, marking a true sexual revolution in which young women, beginning with those in the middle classes, experienced economic, political, and sexual autonomy for the first time in history.
She and her fellow employees cannot get health care coverage for birth control pills or other forms of contraception.
* Take birth control pills. Numerous studies find they can reduce your risk of ovarian cancer, probably by limiting the number of times you ovulate throughout your lifetime.
Respondents were asked multiple fixed-response type questions concerning the effectiveness of condoms, when used consistently and correctly, for preventing STDs and pregnancy (very, somewhat, and not effective), how often birth control pills, when used consistently and correctly, prevent pregnancy (almost all, most, or some of the time), and how safe birth control pills are (very, somewhat, or not safe).
Doctors and auxiliaries should be aware of possibly reduced effectiveness of oral contraceptives (birth control pills) when simultaneously taking antibiotics.
New research has suggested that people who are older, overweight or taking birth control pills have a higher risk of blood clots during long haul flights.