Data on patterns of marriage, differential fertility and mortality
were collected from 211 Kotia women residing in Visakhapatnam district of
Andhra Pradesh, India. Consanguineous marriages made up just over a quarter of
the total, and of these, father's sister's daughter (FSD) were more common
than mother's brother's daughter (MBD). The mean inbreeding coefficient for
the sample (F) was 0·0172. Women in consanguineous marriages had a lower mean
number of total conceptions, live births and living offspring (net fertility)
than women in non-consanguineous marriages. Significant heterogeneity was
found in the means of living offspring for FSD, MBD and non-consanguineous
couples, but not for
conceptions and live births.