The efficiency of menstrual regulation as a method of fertility control.
D000027:Abortion, Incomplete; D000028:Abortion, Induced; D000029:Abortion, Legal; D003201:Computers; D003267:Contraception / Q000379:methods*; D005260:Female; D006801:Humans; D008954:Models, Biological; D011247:Pregnancy; D011258:Pregnancy Tests