title: The use of periodic abstinence for family planning.
authors.affiliation: Department of Obstetrics and Gynecology, Georgetown University Medical Center, Washington, DC 20007.
authors.forename: M H
authors.initials: MH
authors.lastname: Labbok
authors.forename: J T
authors.initials: JT
authors.lastname: Queenan
mesh_terms: D005193:Family Planning Services / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D012252:Natural Family Planning Methods; D012746:Sexual Abstinence; D012725:Sexual Behavior