Body weight, body composition, and energy intake changes are described for 13 breastfeeding mothers followed for 18-24 months after delivery. Body weight was assessed at 1-6, 9, 12, 18, 24 months postpartum and 1 month after infant weaning, and energy intake was assessed at 2-6, 9, 12, 18, 24 months postpartum and 1 month after infant weaning. Compared to prepregnancy weight, participants were an average of 4.0 ± 6.6 kg heavier 18 months postpartum (p<0.05). The mean rate of weight loss from 1 month postpartum until termination of lactation was 0.32 ± 0.27 kg/month. Eight of the 12 women gained weight after weaning their infant. Percent body fat assessed by underwater weighing declined from 34.6 ± 2.8% at 1 month postpartum to 31.4 ± 4.8% at 1 month after infant weaning (p<0.05). Further research is needed to study the factors which affect weight loss postpartum, and how weight gain after weaning can be prevented.
1. Walker LO. Weight gain after childbirth: A women's health concern. Ann Behav Med1995; 17(2):132-141.
2.
2. Greene GW, Smiciklas-Wright H, Scholl TO, Karp RJ. Postpartum weight change: How much of the weight gained in pregnancy will be lost after delivery?Am J Obstet Gynecol1988; 71:701-707.
3.
3. McKeown T, Record RG. The influence of reproduction on body weight in women. J Endocrin1957; 19:393-409.
4.
4. Ohlin A, Rossner S.Maternal body weight development after pregnancy. Int J Obes1990; 14:159-173.
5.
5. Dennis KJ, Bytheway WR. Changes in body weight after delivery. J Obstet Gynaecol Br Common1965; 72:94-102.
6.
6. Manning-Dalton C, Allen LH. The effects of lactation on energy and protein consumption, postpartum weight change and body composition of well nourished North American women. Nutr Res1983; 3:293-308.
7.
7. Brown JE, Kaye SA, Folsom AR. Parity-related weight change in women. Int J Obes1992; 16:627-631.
8.
8. Keppel KG, Taffel SM. Pregnancy-related weight gain and retention: Implications of the 1990 Institute of Medicine Guidelines. Am J Public Health1993; 83:1100-1103.
9.
9. Dewey KG, Heinig MJ, Nommsen LA. Maternal weight-loss patterns during prolonged lactation. Am J Clin Nutr1993; 58:162-166.
10.
10. Janney CA, Zhang D, Sowers MF. Lactation and weight retention. Am J Clin Nutr1997; 66:1116-1124.
11.
11. Butte NF, Wills C, Smith EO, Garza C.Prediction of body density from skinfold measurements in lactating women. Br J Nutr1985; 53:485-489.
12.
12. Naismith DJ, Ritchie CD. The effect of breastfeeding and artificial feeding on body weights, skinfold measurements and food intakes of forty-two primiparous women. Proc Nutr Soc1975; 34:116A-117A.
13.
13. Brewer MM, Bates MR, Vannoy LP. Postpartum changes in maternal weight and body fat depots in lactating vs. non-lactating women. Am J Clin Nutr1989; 49:259-265.
14.
14. Jelliffe DB, Jelliffe EFP. Human Milk in the Modern World. Oxford, England: Oxford University Press, 1978.
15.
15. Taggart NR, Holliday RM, Billewicz WZ, Hytten FE, Thomson AM. Changes in skinfolds during pregnancy. Br J Nutr1967; 46:537-556.
16.
16. Blackburn MW, Calloway DH. Energy expenditure and consumption of mature pregnant and lactating women. J Am Diet Assoc1976; 69:29-36.
17.
17. Wilmore J.A simplified method for determination of residual lung volume. J Appl Physiol1969; 27:96-100.
18.
18. Siri WE. Body composition from fluid spaces and density: an analysis of methods. In: Brozek J, Henschel W.Techniques for Measuring Body Composition. Washington, DC: National Academy of Sciences, 1961:223-244.
19.
19. Mertz W, Tsui JC, Judd JT, Reiser S, Hallfrisch J, Morris ER, Steele PD, Lashley E.What are people really eating? The relation between energy intake derived from estimated diet records and intake determined to maintain body weight. Am J Clin Nutr1991; 54:291-295.
20.
20. Sadurskis A, Kabir N, Wager J, Forsum E.Energy metabolism, body composition, and milk production in healthy Swedish women during lactation. Am J Clin Nutr1988; 48:44-49.
21.
21. Forsum E, Sadurskis A, Wager J.Resting metabolic rate and body composition of healthy Swedish women during pregnancy. Am J Clin Nutr1988; 47:942-947.
22.
22. Lukaski HC. Methods for the assessment of human body composition: Traditional and new. Am J Clin Nutr1987; 46:537-556.
23.
23. Hytten FE, Leitch I.The Physiology of Human Pregnancy. Oxford, England: Blackwell Scientific Publication, 1980.
24.
24. Hopkinson JM, Butte NF, Ellis KJ, Wong WW, Puyau MR, Smith EO. Body fat estimation in late pregnancy and early postpartum: Comparison of two-, three-, and four-component models. Am J Clin Nutr1997; 65:432-438.
25.
25. Dewey KG, McCrory MA. Effects of dieting and physical activity on pregnancy and lactation. Am J Clin Nutr1994; 59(suppl):446S-453S.
26.
26. Institute of Medicine, Food and Nutrition Board, Committee on Nutritional Status During Pregnancy and Lactation. Nutrition During Lactation. Washington, DC: National Academy Press, 1991
