Maternal mortality in the United States of America.
D000028:Abortion, Induced; D000022:Abortion, Spontaneous; D000349:Africa; D001208:Asia; D005060:Europe; D005260:Female; D005313:Fetal Death; D006801:Humans; D008428:Maternal Mortality; D011247:Pregnancy; D012306:Risk; D014481:United States