Maternal mortality--United States, Canada, and Western Europe.
D000022:Abortion, Spontaneous / Q000401:mortality; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002170:Canada; D005060:Europe; D005260:Female; D006801:Humans; D008428:Maternal Mortality; D011225:Pre-Eclampsia / Q000401:mortality; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000401:mortality; D011271:Pregnancy, Ectopic / Q000401:mortality; D014481:United States