Study of maternal mortality.
D000208:Acute Disease; D000328:Adult; D001991:Bronchitis / Q000401:mortality; D006332:Cardiomegaly / Q000401:mortality; D005260:Female; D006333:Heart Failure / Q000401:mortality; D006801:Humans; D008427:Maternal Health Services / Q000193:education; D008428:Maternal Mortality; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000401:mortality*