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Male contraceptives, also known as male birth control, are methods of preventing pregnancy by interrupting the function of sperm. [1] The main forms of male contraception available today are condoms, vasectomy, and withdrawal, which together represented 20% of global contraceptive use in 2019.
Injection of medical polyurethane (MPU) to form a plug in the vas deferens resulted in azoospermia in 96% of men, though these result were seen 24 months after injection. [6] [7] [8] Studies on over 130 men following removal of the plug within five years showed successful restoration of fertility. [6]
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When used as a form of injected birth control, there is a delayed return of fertility. The average return to fertility is 9 to 10 months after the last injection, taking longer for overweight or obese women. By 18 months after the last injection, fertility is the same as that in former users of other contraceptive methods.
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The San Francisco company’s nonhormonal pill works by blocking the vitamin A receptor important for male fertility. ... estimated more than 17 million men in the U.S. want more birth control ...
Birth control, also known as contraception, anticonception, and fertility control, is the use of methods or devices to prevent pregnancy. [ 1 ] [ 2 ] Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. [ 3 ]
[10] [11] In a random international sample of 11,548 men confirmed to be biological fathers by DNA paternity testing, the oldest father was found to be 66 years old at the birth of his child; the ratio of DNA-confirmed versus DNA-rejected paternity tests around that age is in agreement with the notion of general male infertility above age 65–66.