All of the studies followed a sample of 703 African-American, Hispanic and white women between the ages of 16 -33 years-old from 2001 through 2004 who chose their own contraception method.

所有的研究都取样于自2001年到2004年间自主选择避孕法的703位处于16 - 33岁年龄段非裔美国女性，西班牙女性，白种女性。

youdao

While male contraception has been studied before, no method met the stringent safety and effectiveness criteria that female methods do. It was also unclear whether men would use them.

关于男性避孕术已经早有研究，但还没发现一种比女性避孕术更安全有效的方法。而且，尚不能确定男性是否愿意使用这些方法。

youdao

Conclusion: Hypothermia as a method of male-contraception is feasible.

结论提示低温作为一种男性抗生育方法是可行的。

youdao

The other very important cause of irregular bleeding is pregnancy, and if a different method of contraception is not being used it is also essential to do a pregnancy test.

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Many Africans have traditionally used the second method and may now be using contraception to make birth intervals even longer.

ECONOMIST: Africa��s population