Sex ratios in the two Germanies: a test of the economic stress hypothesis.

  title={Sex ratios in the two Germanies: a test of the economic stress hypothesis.},
  author={Ralph Catalano},
  journal={Human reproduction},
  volume={18 9},
BACKGROUND Literature describing temporal variation in the secondary sex ratio among humans reports an association between population stressors and declines in the odds of male birth. Explanations of this phenomenon draw on reports that stressed females spontaneously abort male more than female fetuses, and that stressed males exhibit reduced sperm motility. This work has led to the argument that population stress induced by a declining economy reduces the human sex ratio. No direct test of… CONTINUE READING
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