Explain to your teen that the doctor will review her medical history, conduct a pelvic exam, and go over the risks and benefits of different types of birth control.

告诉孩子们医生要看过他们的病历，给他们做一个骨盆检查，解释各种避孕药物的利弊作用。

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Hvistendahl explains that part of the drop in birth rates in Asia can be attributed to "a history of population control, and a dark history at that."

Hvistendahl解释说亚洲国家的出生率下降的原因可能是“历史上的人口控制——可能是历史上最黑暗的人类行为”。

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But for women who take birth control pills and also smoke, have high blood pressure or have a history of migraine headaches, the stroke risk is significantly higher.

但是对于服用避孕药同时有吸烟、高血压或偏头痛史的女性，中风的危险要高得多。

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It is not only a series of popes but also a number of prominent secular thinkers who believe that the birth-control pill has been one of the major milestones in human history a diverse group that runs from public intellectuals of a previous generation like Walter Lippmann to such contemporary scholars as Francis Fukuyama and Robert Putnam.

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Experts who study the generations say that, thanks to reliable birth control and legalized abortion, the last couple of generations have been the "most wanted" in American history.

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