Different types of combination birth control pills contain different doses of estrogen and progestin.

不同种类的生育控制组合药片含有不同剂量的雌激素和黄体酮。

youdao

Other types of combination birth control pills allow you to reduce the number of periods you have each year.

其他种类的生育控制组合药片可以减少你每年的(排卵)周期数量。

youdao

Oral birth control pills contain hormones that prevent ovulation and reduce the severity of menstrual cramps.

口服含激素的药片会阻止排卵和降低痛经的严重度。

youdao

Drugs like birth control pills contain a version of this chemical.

VOA: special.2010.03.30

There are also exaggerated doubts and fears about birth control pills, the study said.

CNN: Gaps found in young people's sex knowledge

The morning-after pill contains a higher dose of the female progestin hormone than is in regular birth control pills.

WSJ: Obama faces choice on morning-after pill limits

As he guides you through the walled city, he passes out condoms and birth control pills to the poor.

FORBES: Carlos Celdran and Asia's Sinkhole Demographics