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Why isn't there a male birth control pill? Published: March 20, 2013

For Gawker’s scientific weekly feature “Hey Science,” a reader posed a question about why there isn’t a male birth control pill.

Here’s what experts had to say:

John Amory, professor of medicine at the University of Washington

- Men make 1,000 sperm every second from puberty to death whereas women make one egg a month. Suppressing ovulation has proven easier than suppressing sperm production.

- Women have a period during their reproductive life when they are not fertile or pregnant. The female pill mimics pregnancy by administered progesterone to women, thereby preventing ovulation. Men don’t have an analogous period of temporary infertility.

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