Vitamin a Supplementation During Pregnancy in Shaping Child Growth Outcomes: A Meta-analysis

Overview

Journal Crit Rev Food Sci Nutr

Specialty Nutritional Sciences

Date 2022 Jul 19

PMID 35852163

Authors

Guiling Ma

Yanting Chen

Xiangdong Liu

Yao Gao

Jeanene M Deavila

Mei-Jun Zhu

Min Du

Affiliations

Soon will be listed here.

Abstract

Abnormal fetal growth increases risks of childhood health complications. Vitamin A supplementation (VAS) is highly accessible, but literature inconsistency regarding effects of maternal VAS on fetal and childhood growth outcomes exists, deterring pregnant women from VAS during pregnancy. This meta-analysis aimed to analyze effects of vitamin A only or vitamin A + co-intervention during pregnancy in healthy mothers (MH) or with complications (MC, night blindness and HIV positive) on perinatal growth outcomes, also assess VAS dose impacts. The Cochrane Library, PubMed, ScienceDirect, Scopus, Embase and Web of Science databases were searched from inception to July 15, 2021. We covered subgroup analyses, including VAS in MH or MC within randomized controlled trial (RCT) or observational studies (OS). Fifty-five studies were included in this meta-analysis (426,098 pregnancies). Vitamin A decreased risk of preterm birth by 9% in MH-RCT ( < 0.001), by 62% in MH-OS ( = 0.029), by 10% in MC-RCT ( = 0.089); decreased LBW by 24% in MC-RCT ( = 0.032); increased neonatal weight in MC-RCT (SMD 0.96; = 0.051). Besides, vitamin A + co-intervention decreased risks of preterm by 18% in MH-OS ( = 0.021); LBW by 25% in MH-OS ( < 0.001); by 32% in MC-RCT ( = 0.006); decreased neonatal defects by 33% in MH-OS ( = 0.064); decreased anemia by 25% in MH-OS ( = 0.0003); increased neonatal weight in MH-OS (SMD 0.51; = 0.014); and increased neonatal length in MH-OS (SMD 1.83; = 0.013). Meta-regression of VAS dose with individual outcomes was not significant, and no side effects were observed for VAS doses up to 4000 mcg (RAE/d). Regardless of maternal health conditions, VAS during pregnancy can safely and effectively improve fetal development and neonatal health even in mothers without VAD.

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