Study of maternal mortality.
D000208:Acute Disease; D000328:Adult; D012809:Colon, Sigmoid; D005260:Female; D005756:Gastritis / Q000150:complications; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007415:Intestinal Obstruction / Q000175:diagnosis*; D008428:Maternal Mortality; D011247:Pregnancy; D011248:Pregnancy Complications; D011250:Pregnancy Complications, Hematologic; D013276:Stomach Ulcer