Abortion surveillance, 1979-1980.
D000024:Abortion, Illegal; D000028:Abortion, Induced / Q000379:methods / Q000401:mortality; D000022:Abortion, Spontaneous / Q000401:mortality; D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D014481:United States