title: Current hormonal contraceptive use predicts female extra-pair and dyadic sexual behavior: evidence based on Czech National Survey data.
abstract: Data from 1155 Czech women (493 using oral contraception, 662 non-users), obtained from the Czech National Survey of Sexual Behavior, were used to investigate evolutionary-based hypotheses concerning the predictive value of current oral contraceptive (OC) use on extra-pair and dyadic (in-pair) sexual behavior of coupled women. Specifically, the aim was to determine whether current OC use was associated with lower extra-pair and higher in-pair sexual interest and behavior, because OC use suppresses cyclical shifts in mating psychology that occur in normally cycling women. Zero-inflated Poisson (ZIP) regression and negative binomial models were used to test associations between OC use and these sexual measures, controlling for other relevant predictors (e.g., age, parity, in-pair sexual satisfaction, relationship length). The overall incidence of having had an extra-pair partner or one-night stand in the previous year was not related to current OC use (the majority of the sample had not). However, among the women who had engaged in extra-pair sexual behavior, OC users had fewer one-night stands than non-users, and tended to have fewer partners, than non-users. OC users also had more frequent dyadic intercourse than non-users, potentially indicating higher commitment to their current relationship. These results suggest that suppression of fertility through OC use may alter important aspects of female sexual behavior, with potential implications for relationship functioning and stability.
authors.affiliation: Faculty of Humanities, Charles University, Prague, Czech Republic.
authors.forename: Kateřina
authors.initials: K
authors.lastname: Klapilová
authors.affiliation: School of Natural Sciences, University of Stirling, Stirling, United Kingdom.
authors.forename: Kelly D
authors.initials: KD
authors.lastname: Cobey
authors.affiliation: Institute of Human Sciences, Aberystwyth University, Aberystwyth, United Kingdom.
authors.forename: Timothy
authors.initials: T
authors.lastname: Wells
authors.affiliation: School of Natural Sciences, University of Stirling, Stirling, United Kingdom.
authors.forename: S Craig
authors.initials: SC
authors.lastname: Roberts
authors.affiliation: 1st Faculty of Medicine, Charles University, Prague, Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Weiss
authors.affiliation: Faculty of Science, Charles University, Prague, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Havlíček
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000704:Analysis of Variance; D005075:Biological Evolution; D003278:Contraceptives, Oral, Hormonal / Q000494:pharmacology / Q000627:therapeutic use*; D003604:Czechoslovakia / Q000453:epidemiology; D005114:Extramarital Relations; D005191:Family Characteristics; D005260:Female; D006306:Health Surveys / Q000706:statistics & numerical data; D006801:Humans; D007989:Libido / Q000187:drug effects / Q000502:physiology; D016015:Logistic Models; D008393:Marriage / Q000523:psychology; D008597:Menstrual Cycle / Q000187:drug effects / Q000502:physiology*; D008875:Middle Aged; D010298:Parity; D012725:Sexual Behavior / Q000187:drug effects / Q000523:psychology / Q000706:statistics & numerical data*; D012747:Sexual Partners; D016008:Statistical Distributions; D055815:Young Adult
chemical_list: D003278:Contraceptives, Oral, Hormonal