Influence of maternal nutrition on outcome of pregnancy: prospective cohort study.

Abstract:

OBJECTIVE:To investigate the relations of maternal diet and smoking during pregnancy to placental and birth weights at term. DESIGN:Prospective cohort study. SETTING:District general hospital in the south of England. PARTICIPANTS:693 pregnant nulliparous white women with singleton pregnancies who were selected from antenatal booking clinics with stratified random sampling. MAIN OUTCOME MEASURES:Birth and placental weights at term. RESULTS:Placental and birth weights were unrelated to the intake of any macronutrient. Early in pregnancy, vitamin C was the only micronutrient independently associated with birth weight after adjustment for maternal height and smoking. Each ln mg increase in vitamin C was associated with a 50.8 g (95% confidence interval 4.6 g to 97.0 g) increase in birth weight. Vitamin C, vitamin E, and folate were each associated with placental weight after adjustment for maternal characteristics. In simultaneous regression, however, vitamin C was the only nutrient predictive of placental weight: each ln mg increase in vitamin C was associated with a 3.2% (0.4 to 6.1) rise in placental weight. No nutrient late in pregnancy was associated with either placental or birth weight. CONCLUSIONS:Concern over the impact of maternal nutrition on the health of the infant has been premature. Maternal nutrition, at least in industrialised populations, seems to have only a small effect on placental and birth weights. Other possible determinants of fetal and placental growth should be investigated.

journal_name

BMJ

authors

Mathews F,Yudkin P,Neil A

doi

10.1136/bmj.319.7206.339

keywords:

subject

Has Abstract

pub_date

1999-08-07 00:00:00

pages

339-43

issue

7206

eissn

0959-8138

issn

1756-1833

journal_volume

319

pub_type

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