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Menstrual characteristics of mothers of twins

Published online by Cambridge University Press:  31 July 2008

Birgitte Bønnelykke
Birgitte Bønnelykke
Affiliation:
Cytogenetic Laboratory, Aarhus Psychiatric Hospital, Risskov, Denmark
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Summary

The menarcheal age and frequency of menstrual disorders in mothers of dizygotic (DZ) and monozygotic (MZ) twins born in Denmark in 1984 or 1985 were compared with a control sample of mothers of singleton infants born in the same period. Compared to control mothers, mothers of DZ twins had a lower menarcheal age and a lower frequency of menstrual irregularities—menstrual cycles exceeding 5 weeks duration, varying length of menstrual cycles and episodes of menostasia. Mothers of MZ twins had a higher frequency of intermenstrual bleeding compared to mothers of singletons. All results were adjusted for maternal age and parity. The findings are relevant to the interpretation of aetiological factors leading to twin births and support the hypothesis of differences in sex hormone activity of the mothers of DZ twins in comparison with other women.

Type
Research Article
Information
Journal of Biosocial Science , Volume 21 , Issue 3 , July 1989 , pp. 329 - 334
Copyright
Copyright © Cambridge University Press 1989

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