Study of maternal mortality.
D000328:Adult; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D011225:Pre-Eclampsia / Q000150:complications / Q000401:mortality*; D011247:Pregnancy; D011655:Pulmonary Embolism / Q000209:etiology*