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Related Experiment Videos

Coital frequency and twinning.

B Bønnelykke1, J Olsen, J Nielsen

  • 1Cytogenetics Laboratory, Aarhus Psychiatric Hospital, Denmark.

Journal of Biosocial Science
|April 1, 1990
PubMed
Summary
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Parents of twins, including dizygotic twins, do not have more frequent sexual intercourse than parents of singleton infants. This comparative study found no significant difference in coital frequency between these groups.

Area of Science:

  • Reproductive Health
  • Human Sexuality
  • Perinatal Studies

Background:

  • Investigating factors influencing reproductive outcomes is crucial for understanding population dynamics.
  • Previous research has not conclusively determined if parents of multiple births exhibit different sexual behaviors compared to parents of singletons.
  • Understanding coital frequency in relation to twinning can offer insights into reproductive physiology.

Purpose of the Study:

  • To compare the frequency of sexual intercourse in parents of twins versus parents of singleton infants.
  • To specifically examine if parents of dizygotic (fraternal) twins report higher coital frequency.
  • To explore potential links between coital frequency and the occurrence of multiple births.

Main Methods:

  • A comparative study design was employed, utilizing postal questionnaires.

Related Experiment Videos

  • Data collected included sociodemographic status, coital frequency, and other relevant variables.
  • Cases comprised parents of all live-born twins in Denmark (1984-1985); controls were a random sample of parents of singleton infants from the same period.

    • Main Results:

    • No statistically significant difference in coital frequency was observed between parents of twins and parents of singleton infants.
    • This finding applied to parents of both dizygotic and monozygotic twins.
    • Sociodemographic factors and other collected variables did not reveal a differential coital frequency linked to twinning.

    Conclusions:

    • The study found no evidence to support the hypothesis that parents of twins, particularly dizygotic twins, engage in sexual intercourse more frequently than parents of singleton infants.
    • Coital frequency does not appear to be a differentiating factor in the occurrence of twin births based on this study's findings.
    • Further research may explore other potential biological or environmental factors associated with twinning.