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Maternal body composition near term and birth weight
F Mardones-Santander1, G Salazar, P Rosso
1Department of Public Health, and Center for Medical Research, School of Medicine, Catholic University of Chile, Santiago. mardones@med.puc.cl
Obstetrics and Gynecology
|June 4, 1998
Summary
Maternal fat-free mass is the most significant factor influencing infant birth weight in late pregnancy. Maternal fat mass also plays a role, highlighting the importance of body composition for healthy fetal development.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Human Physiology
Background:
- Maternal body composition is a critical determinant of fetal growth and birth weight.
- Understanding the specific components of maternal body composition that influence birth weight is essential for optimizing pregnancy outcomes.
Purpose of the Study:
- To evaluate the relative impact of maternal body composition, specifically fat-free mass and fat mass, on birth weight in late gestation.
Main Methods:
- A cohort of 224 pregnant women was studied near term.
- Maternal body composition was assessed using the deuterium dilution technique.
- Stepwise multiple linear regression analysis identified key predictors of birth weight.
Main Results:
- Maternal fat-free mass emerged as the primary predictor of birth weight (R² = .144, P < .001).
- Maternal fat mass was the second most influential factor (R² = .051, P < .001).
- Gestational age at delivery also showed a significant association with birth weight (R² = .047, P < .001).
Conclusions:
- Maternal fat-free mass is the most significant maternal body component associated with birth weight in late pregnancy.
- Further longitudinal research is recommended to elucidate the dynamic influence of maternal body composition on fetal development.