PMC

https://pmc.ncbi.nlm.nih.gov/articles/PMC13349791/

Highlights

• First comprehensive meta-analysis of 34 studies including 761,511 singleton pregnancies examining the association between pre-pregnancy underweight and perinatal outcomes among Japanese women.
• Maternal underweight significantly increases the risk of low birth weight (odds ratio [OR] 1.61), small for gestational age (OR 1.59), and preterm birth (OR 1.23).
• Infants born to underweight mothers had a mean birth weight 115g lower than those born to normal weight mothers.
• Despite its high prevalence in Japan, underweight remains significantly associated with adverse perinatal outcomes, similar to patterns observed in other populations.

Selected Result