That, in turn, would explain why women in rich countries, who are less likely to suffer from hunger and disease, are more likely to give birth to sons.

结果那就解释了发达国家的女人(他们不太可能挨饿或染上疾病)为什么更可能产下儿子。

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Previous studies have shown that women who live in cultures where greater value is placed on sons are more likely to suffer from PND if they give birth to a girl.

以前的研究表明，生活在重男轻女文化背景下的妇女如果生了一个女孩，则更易遭受PND的痛苦。

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That, in turn, would explain why women in rich countries, who are less likely to suffer from hunger and disease, are more likely to give birth to sons.

ECONOMIST: The sex of a child may depend on how stressed its mother is