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Concept
Male contraceptive
Summary
Male contraceptives, also known as male birth control, are methods of preventing pregnancy that solely involve the male physiology. The most common kinds of male contraception include condoms, outercourse, and vasectomy. In domestic animals, castration is commonly used for contraception. Other forms of male contraception are in various stages of research and development. These include methods like RISUG/VasalGel (which has completed a small phase II clinical trial in humans in India) and ultrasound (with results so far obtained in experimental animals).
Vasectomy is a surgical procedure for male sterilization or permanent birth control. During the procedure, the vasa deferentia of a man are severed, and then tied or sealed to prevent sperm from entering into the seminal stream (ejaculate). Vasectomies are usually performed in a physician's office or medical clinic. CDC research has estimated there is a probability of 11 failures per 1,000 procedures over 2 years; half of the failures occurred in the first three months after the vasectomy, and no failures occurred after 72 weeks. Due to the presence of sperm retained beyond the blocked vasa deferentia, vasectomies only become effective about three months following the operation. With perfect use, the Pearl Index is 0.1. With typical use, it is 0.15.
A condom is a sheath-shaped barrier device that may be used during sexual intercourse to reduce the probability of pregnancy. It is rolled onto an erect penis before intercourse and blocks ejaculated semen from entering the sexual partner's reproductive system.
With perfect use, the pregnancy rate of condoms is 2% and the Pearl Index is 3. With typical use, it is 14. Condoms may be combined with other forms of contraception (such as spermicide) for greater protection. The typical use pregnancy rate among condom users varies depending on the population being studied, ranging from 10 to 18%.
The withdrawal method is a behavior that involves halting penile-vaginal intercourse to remove the penis out and away from the vagina prior to ejaculation.
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Birth control
Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent unintended pregnancy. Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. Planning, making available, and using human birth control is called family planning. Some cultures limit or discourage access to birth control because they consider it to be morally, religiously, or politically undesirable.
Hormonal contraception
Hormonal contraception refers to birth control methods that act on the endocrine system. Almost all methods are composed of steroid hormones, although in India one selective estrogen receptor modulator is marketed as a contraceptive. The original hormonal method—the combined oral contraceptive pill—was first marketed as a contraceptive in 1960. In the ensuing decades many other delivery methods have been developed, although the oral and injectable methods are by far the most popular.
Medroxyprogesterone acetate
Medroxyprogesterone acetate (MPA), also known as depot medroxyprogesterone acetate (DMPA) in injectable form and sold under the brand name Depo-Provera among others, is a hormonal medication of the progestin type. It is used as a method of birth control and as a part of menopausal hormone therapy. It is also used to treat endometriosis, abnormal uterine bleeding, paraphilia, and certain types of cancer. The medication is available both alone and in combination with an estrogen.