The authors have reviewed the sex ratio in 353 offspring of adolescent parturients based on a 5-year material of their department. The 174 males and 179 females provided a sex ratio of 97.2; less than the usual ratio of 106. Interestingly, females are prevalent not only among low-birth-weight but also among average-birth-weight babies of adolescents. The hypothesis is presented that the anatomy of the cervix and the chemical composition of the cervical mucus may affect the sex ratio in some manner.
机构:
Center on Population Dynamics, University of Southern Denmark, OdenseCenter on Population Dynamics, University of Southern Denmark, Odense
Bergeron-Boucher M.-P.
Canudas-Romo V.
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School of Demography, Australian National University, ACTCenter on Population Dynamics, University of Southern Denmark, Odense
Canudas-Romo V.
Pascariu M.
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Center on Population Dynamics, University of Southern Denmark, OdenseCenter on Population Dynamics, University of Southern Denmark, Odense
Pascariu M.
Lindahl-Jacobsen R.
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Center on Population Dynamics, University of Southern Denmark, Odense
Department of Epidemiology and Biostatistics, University of Southern Denmark, Institute of Public Health, OdenseCenter on Population Dynamics, University of Southern Denmark, Odense