Maternal underweight and the risk of preterm birth and low birth weight: a systematic review and meta-analyses

BACKGROUND: Despite the current obesity epidemic, maternal underweight remains a common occurrence with potential adverse perinatal outcomes. Our objective was to determine the relationship between maternal underweight and preterm birth (PTB) and low birth weight (LBW) in singleton pregnancies in developing and developed countries. METHODS: We followed the MOOSE consensus statement. We searched MEDLINE and EMBASE from their inceptions. We …