Steroid hormones, on the other hand, molecules like testosterone and estrogen, progesterone, the sex steroids that determine sexual characteristics and are important for reproductive function are molecules that are all derived from a similar source.

另一方面,类固醇类激素,像睾丸激素,雌激素,黄体酮这样的分子,性激素决定了性征,它对生殖功能十分重要,这类分子有着相似的来源

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There are innovators from across the region who are trying to tackle the taboos, break the silence and deal with the fall out, be it getting sexuality education in schools or providing sexual and reproductive health services for young people, or tackling sexual violence, or trying to find space in society for those cross social norms, unwed mothers or men and women in same-sex relations among them.

CNN: Why Arab world must learn to talk about sex

The health council says it operates the country's largest Title X system in the country, providing sexual and reproductive health care for more than 1 million Californians a year.

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My plan is to ensure that every young girl in Liberia has a quality education and information about sexual and reproductive health -- but I will need more support to make that happen.

CNN: Girls at risk: Starting a revolution for teenage mothers