Change in male:female ratio among newborn infants in Denmark

  title={Change in male:female ratio among newborn infants in Denmark},
  author={Henrik M\oller},
  journal={The Lancet},
SIR—It is well known that the human male:female ratio at birth has a slight male excess. Many factors have been identified that may affect the male:female ratio—eg, time of insemination within the cycle, birth order, age of the parents, and certain hormonal treatments and chemical exposures. James suggested that male reproductive hazards may usefully be monitored by low offspring male:female ratios, as an alternative to other indices such as sperm counts, conception waits, or hormone assays… CONTINUE READING
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