title: The frequency of sexual intercourse reported by women: a review of community-based studies and factors limiting their conclusions.
abstract: BACKGROUND
  A range of methodological inconsistencies has the potential to affect reported prevalence rates of sexual intercourse.
  
  
  OBJECTIVE
  We reviewed published studies of sexual intercourse frequency reported by women and associated factors.
  
  
  METHODS
  Literature search of electronic databases. Inclusion criteria for selected cross-sectional studies were population and community-based studies of frequency of intercourse in women published in English or German languages with sample size greater than 300. Longitudinal studies were selected if duration was at least 1 year and samples were not clinically based.
  
  
  METHODS
  Frequency of sexual intercourse/activities and any associated factors.
  
  
  RESULTS
  There was a great deal of variation in the mean frequency of intercourse across all age groups with higher rates reported by European and American women. There was a reduction in frequency of sexual intercourse from age 50 among women from Europe and the United States. Asian women reported increasing rates through the age group 20-30 followed by a decline. Change with age was not as evident among African and South American studies. Factors most often associated with the frequency of sexual intercourse were age, parity, duration of relationship, pregnancy, time, relationship status, fertility intentions, and contraception.
  
  
  CONCLUSIONS
  There is variation in reported frequency of sexual intercourse between studies, age groups, and continents. Some of the variation may be due to variation in definitions, study designs, and methods suggesting a need for greater consistency in research practice.
authors: Office for Gender and Health, Department of Psychiatry, The University of Melbourne, Victoria, Australia.
authors: Anja
authors: A
authors: Schneidewind-Skibbe
authors: Richard D
authors: RD
authors: Hayes
authors: Patricia E
authors: PE
authors: Koochaki
authors: Joan
authors: J
authors: Meyer
authors: Lorraine
authors: L
authors: Dennerstein
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D001294:Attitude to Health / Q000208:ethnology*; D003075:Coitus; D003268:Contraception Behavior / Q000706:statistics & numerical data; D003430:Cross-Sectional Studies; D003466:Cultural Characteristics; D005260:Female; D014943:Global Health; D006801:Humans; D008019:Life Style; D008137:Longitudinal Studies; D008875:Middle Aged; D011159:Population Surveillance / Q000379:methods*; D012044:Regression Analysis; D012107:Research Design; D012725:Sexual Behavior / Q000145:classification* / Q000208:ethnology* / Q000706:statistics & numerical data; D012747:Sexual Partners