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  • Title: Effects of consanguineous marriages on fertility among three endogamous groups of Andhra Pradesh.
    Author: Reddy PG.
    Journal: Soc Biol; 1987; 34(1-2):68-77. PubMed ID: 3686072.
    Abstract:
    To assess interrelationships between consanguineous marriage and fertility, 3 caste groups in Andhra Pradesh--the Desuri Kapu, an affluent agricultural caste; the Devanga, an artisan caste in the middle range of the hierarchy; and the Mala, a scheduled caste at the bottom--were selected for field study. Consanguineous marriages are an essential part of the social structure in this area of southern India. A total of 2524 marriages were analyzed, of which 46% were consanguineous. 19% of consanguineous marriages were between uncle and niece, 22% were between 1st cousins, and 5% were between more distant cousins. The Devanga had the highest rate of related marriages (48%), followed by the Desuri Kapu (47%) and the Mala (41%). Higher caste individuals, and wealthier persons within each caste, are more likely to marry relatives so they can avoid splitting their properties through dowry of bride price. The consanguineous unions as a whole were significantly more fertile than nonconsanguineous unions. The mean number of pregnancies, live births, and surviving offspring was 4.85, 4.44, and 2.99, respectively, among consanguineous couples compared with 3.41, 3.32, and 2.87, respectively, among nonconsanguineous couples. Although the number of pregnancies and live births was significantly higher among consanguineous couples in all 3 castes compared with nonconsanguineous couples, the difference in the number of surviving children between consanguineous and nonconsanguineous unions was not significant among the wealthier castes. This suggests that child mortality is higher among the offspring of consanguineous unions, despite their greater wealth.
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