It's possible to use standard estrogen-progestin birth control pills for emergency contraception, but check with your doctor for the proper dose and timing of the pills.

服用标准的雌激素-孕激素避孕药进行紧急避孕是可行的，但须与医生讨论适当的服药剂量和时间。

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She and her colleagues have just completed a review of 11 medical studies that measured the effectiveness of advance provision of emergency contraception.

VOA: standard.2010.03.22

So she says(In other words) while emergency contraception is effective for individual women, advance provision can't be expected to make a different in the community.

VOA: standard.2010.03.22

"We found that easier access to emergency contraception did help women use the pills more quickly when it was needed, and they used it more often, but despite that increased use and faster use, it didn't reduce rates of unintended pregnancy."

VOA: standard.2010.03.22

Controversy surrounding emergency contraception in the United States has lasted more than just one morning.

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Family planning experts have been campaigning for more than five years to increase access to emergency contraception.

BBC: News | UK Politics | MPs call for over-the-counter pills

The only thing predicting whether or not women would buy emergency contraception over the counter was income.

BBC: Cutting the cost may increase uptake further