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© 1993 Oxford University Press

research-article

Consanguinity as a Determinant of Reproductive Behaviour and Mortality in Pakistan

ALAN H BITTLES*, JONATHAN C GRANT* and SAJJAD A SHAMI{dagger}

* Anatomy and Human Biology Group, Biomedical Sciences Division, King's College, University of London London WC2R 2LS UK
{dagger} Department of Biological Sciences, Quaid-i-Azam University Islamabad, Pakistan

To determine the prevalence of consanguineous marriages and estimate the effects of consanguinity on reproductive behaviour and mortality, household and hospital-based surveys were conducted in 11 cities in the Pakistan province of Punjab between 1979 and 1985. The 9520 women interviewed reported 44474 pregnancies, with data collected on maternal and paternal ages at marriage, abortions/miscarriages, stillbirths and deaths in the first month, at 2–12 months and 2–8/10 years. Six categories of consanguineous marriage were included: double first cousin, first cousin, first cousin once removed/double second cousin, second cousin, bradari (brotherhood) and non-consanguineous. Marriages contracted between spouses related as second cousins or closer accounted for 50.3% of the total, equivalent to an average coefficient of kinship ({alpha} = {sigma}piFi) of 0.0280. Unions between close biological relatives were characterized by younger maternal and paternal ages at marriage and reduced spousal age difference, but a longer time to first delivery. Overall, they exhibited greater fertility than non-consanguineous couples. Antenatal and postnatal mortality were assessed by consanguinity and age interval. Consanguinity-associated deaths were consistently higher in the neonatal, infant and childhood periods. The consequences of these outcomes on the health of the present and future generations is assessed.

Received 1 November 1992


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[Abstract] [Full Text] [PDF]


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