It isn't known why high levels of cortisol appear to cut the odds of having a boy.
我们尚且无法得知为什么高皮质醇水平会降低生育男孩的几率。
The gender of a baby is determined by the chromosomes in the father's sperm and so is set at conception.
婴儿的性别是由男性精子的染色体决定的,这在受孕时已经确定。
But it is possible that high levels of cortisol somehow make it more difficult for male embryos to implant in the womb.
但皮质醇水平过高,可能会使男性的胚胎在植入女性子宫时变得更加困难。
In addition, male babies may be more fragile and so more likely to be miscarried when cortisol levels are high, leading to more girls being born.
此外,男性婴儿可能更加脆弱,当皮质醇水平增高时,流产的可能性更大,这也导致了更多女婴的诞生。
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