Document Type



The possible physiologic effect of the differential enzymic activities of placental alkaline phosphatase alleles Pls', PI*1 and PI'1 on the early developmental phases of human life is studied. Growth data (body weight, total length, crown-rump length and head circumference) on about 600 middle class Bengali infants from Calcutta, India in the first year of their life are related to their alkaline phosphatase genotypes. The study does not reveal any differential physiologic action of these enzymic electrophoretic variations. The growth rates in the present sample are seen to be in con­formity with other surveys describing the standards set for Indian infants.