The Demographic Characteristics
P. H. REDDY and B. MODELL of Department of Obestrics and Gynaecology, University College London Medical School, London, UK have studied the demographic characteristics of the Baiga tribe, one of the most primitive of the aboriginal tribal groups of Central India. It is found that the Baiga population has grown steadily since the first anthropological study of the tribe in the 1930s. Age at menarche, age at marriage, breast-feeding, and time interval between marriage and first conception are natural. There are more females than males. Sub-tribe endogamy is common; consanguineous marriage is favoured (34% of marriages are between first cousins) and marital distance is low (mean 7·1 km). Though the mean menarcheal age is high (15·2 years), mean age at first marriage is low (16·6 years), giving a long reproductive period.
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