The hour of birth; a study of the distribution of times of onset of labour and of delivery throughout the 24-hour period.
D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007743:Labor, Obstetric / Q000502:physiology*; D036801:Parturition; D011247:Pregnancy
DELIVERY; LABOR/physiology
Br J Soc Med. 1951 Jan;5(1):41-61
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