Dr Obel found that the more stressed a mother had been, the less chance she had of having given birth to a boy.

Obel博士发现母亲所受的压力越大，所生孩子为男孩的概率越小。

youdao

However, Carsten Obel, a researcher at Aarhus who was not involved in the earlier study, wondered if the same might be true of chronic stress too.

然而奥尔·胡斯大学的研究员Carsten Obel在考虑这种情况也有可能是由于长期受到压力的缘故。他并没有参与以前的那些研究。

youdao

A number of studies have linked preterm birth to an increased risk of ADHD, although the reasons aren't clear, noted Obel, of Aarhus University in Denmark.

丹麦奥尔·胡斯大学的阿贝尔说，已经有许多研究将早产和多动症患病风险联系到一起，但是目前原因尚不明确。

youdao

Dr Obel used a set of data collected between 1989 and 1992.

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

Dr Obel found that the more stressed a mother had been, the less chance she had of having given birth to a boy.

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

Dr Obel suspects the immediate cause is that male pregnancies are more likely to miscarry in response to stress than female pregnancies are, especially during the first three months.

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