title: Pregnancy-induced hypertension and duration of sexual cohabitation.
abstract: OBJECTIVE
  To evaluate the possible association between duration of sexual cohabitation and the risk of pregnancy-induced hypertension (PIH).
  
  
  METHODS
  A matched case-control design in which each case of PIH was compared with three controls. Information was obtained about use of barrier contraception, duration of intercourse prior to pregnancy and paternity.
  
  
  RESULTS
  Sixty-eight cases were included in the study. For primiparous women, a shorter duration of sexual cohabitation without contraception was associated with a small and nonsignificant risk of PIH. For multiparous women, a greater length of time since stopping use of barrier contraception was associated with a greater risk of PIH.
  
  
  CONCLUSIONS
  Advising nulliparous women to prolong the duration of sexual cohabitation prior to conception in an effort to decrease the risk of PIH is not justified, based on the findings of this study.
authors.affiliation: Department of Obstetrics and Gynecology, St. Elizabeth Health Center, Youngstown, USA.
authors.forename: R N
authors.initials: RN
authors.lastname: Morcos
authors.forename: C C
authors.initials: CC
authors.lastname: Bourguet
authors.forename: P P
authors.initials: PP
authors.lastname: Gill
authors.forename: O
authors.initials: O
authors.lastname: Khawli
authors.forename: M A
authors.initials: MA
authors.lastname: Krew
authors.forename: J
authors.initials: J
authors.lastname: Eucker
authors.forename: P
authors.initials: P
authors.lastname: Skarote
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D003075:Coitus; D003270:Contraceptive Agents; D005260:Female; D006801:Humans; D006973:Hypertension / Q000209:etiology* / Q000503:physiopathology; D008297:Male; D010298:Parity; D011247:Pregnancy; D011248:Pregnancy Complications; D018570:Risk Assessment; D013997:Time Factors
chemical_list: D003270:Contraceptive Agents