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Coital frequency and twinning

Published online by Cambridge University Press:  31 July 2008

B. Bønnelykke ,
J. Olsen  and
J. Nielsen
B. Bønnelykke
Affiliation:
Cytogenetics Laboratory, Aarhus Psychiatric Hospital, Denmark
J. Olsen
Affiliation:
Institute of Social Medicine, University of Aarhus, Denmark
J. Nielsen
Affiliation:
Cytogenetics Laboratory, Aarhus Psychiatric Hospital, Denmark
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Summary

In a comparative study to enquire whether parents of twins, especially of dizygotic twins, have a higher frequency of sexual intercourse than parents of singleton infants, data on sociodemographic status, coital frequency and other variables were collected using a postal questionnaire. Parents of all twins born alive in Denmark in 1984 or 1985 were included as cases and a random sample of parents of singleton infants born in the same period were controls. No evidence of any difference in coital frequency was found between parents of twins (neither dizygotic twins nor monozygotic) and parents of singleton infants.

Type
Research Article
Information
Journal of Biosocial Science , Volume 22 , Issue 2 , April 1990 , pp. 191 - 196
Copyright
Copyright © 1990, Cambridge University Press

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