A retrovirus that infected our ancestors 100 million years ago became a human gene that is expressed in embryos and cancers, and can be detected in the blood of pregnant women. Accumulating evidence suggests potential roles for endogenous retroviruses in early life events, which may affect adult health.

中文翻译：

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内源性逆转录病毒在生命早期事件中的作用

一亿年前感染我们祖先的逆转录病毒成为人类基因，在胚胎和癌症中表达，并且可以在孕妇的血液中检测到。越来越多的证据表明内源性逆转录病毒在早期生活事件中的潜在作用，这可能会影响成人健康。