Twinning In Selected Coastal Areas Of South Kerala.

A total of 26,237 deliveries were monitored for twinning and malformations at the 4 government hospitals catering to the population of Kollam and Alapuzha-districts of South Kerala. Among these 7.8 per thousand were twin births showing an increase in the incidence with maternal age. The twin births were high among children of consanguineous marriages (11.7 per thousand) as compared to non-consanguineous marriages (7.7 per thousand). Still births and malformations were also higher in twin deliveries as against singleton deliveries. A large data base is being built to establish a twin registry.