CHANGES IN ENERGY-EXPENDITURE, ANTHROPOMETRY, AND ENERGY-INTAKE DURING THE COURSE OF PREGNANCY AND LACTATION IN WELL-NOURISHED INDIAN WOMEN

Basal metabolic rate (BMR), thermic effect of a meal (TEM), anthropome try, and dietary intakes were measured in 18 control subjects; 18 preg nant women at 12, 24, and 34 wk gestation; and in 17 of these women at 12 and 24 wk postpartum, to uncover any metabolic economy associated with either pregnancy or lactation. Results indicated that the BMR and TEM were not associated with any energy saving either during pregnanc y or lactation. Mean weight gain from 12 wk gestation to term was 11.4 +/- 3.7 kg; mean birth weight of the infants was 3.06 +/- 0.41 kg. Es timated gain in adipose tissue and fat mass were 3.1 +/- 3.6 and 2.5 /- 2.9 kg, respectively. Energy cost of pregnancy was estimated to be 303 +/- 171 MJ. The cumulative increase in energy intake over the last two trimesters of pregnancy was 290 +/- 280 MJ, meeting a large part of the total estimated cost of pregnancy. Weight gained by infants who were exclusively breast-fed from birth to 12 wk of age was used as a proxy indicator of adequate lactational performance. The extra energy required during lactation appeared to have been met largely by increas es in energy intake, rather than by any metabolic economy or increase in fat mobilization.