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How does male contraceptive injection work?

Birth control has long been for women only, but soon there will be a new form of birth control for men other than condoms and vasectomy. A new research, published in the Journal of Clinical Endocrinology & Metabolism, could revolutionize contraception. It found that an injection for men appears to be just as effective at preventing pregnancy as the birth control pill.

The contraceptive is a form of testosterone that is injected into the buttocks once a month. It works by temporarily blocking sperm production. Chinese researchers injected 1,045 healthy Chinese men aged 20 to 45 years with a 500 mg of testosterone undecanoate in oil, once a month for 24 months. All of the study participants had had at least one child and all their female partners, aged 18 and 38 years, also had normal reproductive function. They found the contraceptive was almost 99 per cent effective, with a failure rate of only 1.1 per 100 men.

More about this in the video below with Dr. Rhonda Low from CTV:

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Comments

Comment from H
Time June 11, 2009 at 12:29 PM

I think this is ridiculous, even women taking birth control pills, who knows the side effects, you shouldn’t work against nature, stop taking pills!

Comment from P
Time June 18, 2009 at 2:13 PM

Wow that is about as narrow minded a comment as possible H. “shouldn’t work against nature” is that only for reproductive issues or should cancer patients just accept what nature has given them and go peacefully into the night? If someone is not willing or able to care for a child then wouldn’t it be better for not only them but society in general to not have children? I would hope that the majority of unplanned/unwanted pregencies end up where the child is loved and nurtured but how many times does that really happen? If someone knows that they do not want a child isn’t it more responsible of them to prevent the pregnancy in the 1st place?

Comment from H
Time June 18, 2009 at 4:45 PM

Stop making assumptions P, I didn’t mean ‘work against nature’ in the general sense, so your cancer example does not apply, I was only referring to birth control, I was saying that those pills have side effects, some women might not be able to get pregnant again because of them. If you don’t want children, then let the man put a condom, end of story. Don’t take medicine for that, that’s the point.

Comment from P
Time June 19, 2009 at 4:23 PM

Who’s making assumptions? You’re comment was open to broad interpretation and I asked for clarification. Are women not made aware of the risks when visiting their doctors? The whole debate about condom’s is for another time. Not saying they are good or bad but they obviously will not work if no one came prepared(meaning not actually having a condom in their possession). My problem with your comments before are your totalitarian belief that all people should not use medicinal birth control. Margaret Sanger and others fought very long and hard for a reason to have birth control legalized in the 1st place. http://www.time.com/time/time100/leaders/profile/sanger.html is a good article. I think people should have the freedom of choice to practice birth control in how they see fit within the law and not be berated for their choices. If you are concerned about one’s well being believing that they are not aware of possible consequences of their actions then point that out but don’t make a blanket statement of saying to “stop taking pills” .

Comment from Wase
Time June 21, 2009 at 2:46 AM

I think you’ll find that blocking sperm production has shrinking effects on the crown jewels… (just thought i’d lighten up the atmosphere around here)

Comment from P
Time June 22, 2009 at 9:14 AM

funny.

Comment from Tom
Time November 16, 2010 at 5:38 AM

Hi. It’s so nice!I like it so much! Thank you for you give me so wonderful information

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