Any gains from having more than one offspring at a time might be expected to be like higher infant and maternal mortality rates.

每次从多于一个孩子那里获得的比期望的更多，通常会伴随着较高的婴儿死亡率和母亲死亡率。

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Any gains from having more than one offspring at a time might be expected to be outweighed by costs like higher infant and maternal mortality rates.

每次从多于一个孩子那里获得的比期望的更多，通常会伴随着较高的婴儿死亡率和母亲死亡率。

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Only three developed countries have higher infant mortality rates.

CNN: Commentary: Health care can't wait

Ranked at number 23, the UK had fewer women in Parliament and higher maternal and infant mortality rates than much of Europe, Save the Children reported.

BBC: UK fails to make top 20 in mother's index

With rates of infant mortality about 15 times higher than those today, many of your generation did well to make it.

BBC: Go Figure: When was the real baby boom?