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Lactation and changes in maternal metabolic risk factors
Erica P Gunderson1, Cora E Lewis, Gina S Wei
1Division of Research, Epidemiology and Prevention Section, Kaiser Permanente, Oakland, California 94612, USA. epg@dor.kaiser.org
Obstetrics and Gynecology
|March 3, 2007
Summary
Lactation may help reduce negative metabolic changes after pregnancy. Longer lactation durations (≥3 months) are linked to better high-density lipoprotein cholesterol levels post-weaning.
Area of Science:
- Reproductive Health
- Metabolic Health
- Cardiovascular Disease Prevention
Background:
- Pregnancy is associated with unfavorable changes in maternal metabolic risk factors.
- The role of lactation in mitigating these postpartum changes requires further investigation.
Purpose of the Study:
- To investigate the relationship between the duration of lactation and changes in maternal metabolic risk factors.
- To compare metabolic changes in lactating, non-lactating, and non-gravid women over a 3-year period.
Main Methods:
- A 3-year prospective study involving lactating, non-lactating, and non-gravid women.
- Metabolic risk factors (weight, waist girth, LDL cholesterol, HDL cholesterol, fasting insulin) were measured from preconception to postweaning/postdelivery.
- Multiple linear regression models were used to analyze changes, adjusting for covariates.
Main Results:
- Both non-lactating and lactating parous women gained more weight and waist girth than non-gravid women.
- Non-lactating women showed greater increases in LDL cholesterol and fasting insulin compared to lactating women.
- Lactation for 3 months or longer was associated with a smaller decrease in HDL cholesterol compared to shorter lactation durations.
Conclusions:
- Lactation may attenuate unfavorable metabolic risk factor changes associated with pregnancy.
- These beneficial effects of lactation on metabolic health are observable even after weaning.
- Lactation represents a modifiable behavior that may influence women's long-term risk of cardiovascular and metabolic diseases.
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