The Effect of Maternal Age at the First Childbirth on Gestational Age and Birth Weight: The Japan Environment and Children's Study (JECS).
Hyo KyozukaKeiya FujimoriMitsuaki HosoyaSeiji YasumuraTadahiko YokoyamaAkiko SatoKoichi Hashimotonull nullPublished in: Journal of epidemiology (2018)
The present study showed that higher maternal age (>30 years) at the first childbirth was an independent risk factor for PTB, LBW, and SGA.