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Int J Obes Relat Metab Disord. 2003 Jul;27(7):815-20.

Prospective assessment of exclusive breastfeeding in relation to weight change in women.

Author information

1
Instituto de Medicina Social, State University of Rio de Janeiro, Rio de Janeiro, Brazil. sichieri@uerj.br

Abstract

OBJECTIVE:

To study prospectively the relation of parity, prepregnancy body mass index (BMI), and exclusive breastfeeding to weight gain.

DESIGN:

The cohort of the Nurse's Health Study II, with analysis restricted to women who were aged 24 to 40 y at baseline (1989), who had a history of no more than one past full-term pregnancy at baseline, gave birth to one child between 1990 and 1991, but had no other pregnancies during the follow-up.

SUBJECTS:

1538 of the 33 082 nulliparous women and 2810 of the 20 261 primiparous, in 1989.

MEASUREMENTS:

Introduction of daily formula/milk was assumed to represent the end of exclusive breastfeeding period. Duration of exclusive breastfeeding was categorized into 0, 1-3, 4-7, 8-11, and 12 months or more.

RESULTS:

After adjusting for age, physical activity, and BMI in 1989, lactation was associated with a weight gain from 1989 to 1993 of approximately 1 kg (statistically significant only for women nulliparous in 1989 with a BMI <25 kg/m(2) (P=0.02) and for those women primiparous in 1989, with a BMI >/=25 kg/m(2) (P=0.04)) comparing women who breastfed with women who did not, and duration of lactation was unrelated to the magnitude of weight change (P>0.40 for all comparisons).

CONCLUSIONS:

Although promotion of breastfeeding has high priority because of its enormous advantages for a newborn child, the associated maternal weight reduction is minimal. Dietary guidelines for pregnant and breastfeeding women should include ways to prevent weight retention after parity.

PMID:
12821967
DOI:
10.1038/sj.ijo.0802285
[Indexed for MEDLINE]
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