The sex of the embryo is predetermined at fertilization.

胚胎的性别早在受精时就决定了。

《牛津词典》

The new technique has been used to identify the sex of fetuses.

这项新技术已被用来鉴定胎儿的性别。

《柯林斯英汉双解大词典》

A female stores sperm and can determine the sex of each egg she lays by fertilizing it or leaving it unfertilized.

雌性储存精子，可以通过受精或不受精来决定每一个卵细胞的性别。

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And that does not even include people forced to work in the sex industry.

VOA: special.2009.06.08

Those are not necessarily bad reasons to take this course, and with the exception of the sex part, this course might actually help you out with some of these things.

作为选择这门课程的理由,这些倒也并不算太差,当然除了性这个方面,这门课实际上还是能够帮助你们,解决一些问题的

耶鲁公开课 - 心理学导论课程节选

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

耶鲁公开课 - 生物医学工程探索课程节选

But the Sex Pistols, despite resurfacing over the years, were only his first act.

NEWYORKER: Take a PiL

The 25-year-old Bryant, who is married and has a daughter, said the sex was consensual.

CNN: Judge deals blow to Bryant defense

For girls with ambiguous genitalia, the sex organs often work normally despite the ambiguous outward appearance.

CNN: Ambiguous genitalia