Significance of the site of the placenta for the presentation of the foetus, the duration of labour and the incidence of toxaemia.
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007746:Labor Presentation; D007743:Labor, Obstetric; D010920:Placenta; D011225:Pre-Eclampsia / Q000453:epidemiology*; D011247:Pregnancy