Maternal morbidity in the United States.
Carol
C
Potera
D005260:Female; D006304:Health Status; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology* / Q000451:nursing; D011256:Pregnancy Outcome; D014481:United States / Q000453:epidemiology