JUL 19, 2026 · JOURNAL ARTICLE
Weight-gain-for-gestational-age z-score in twin pregnancies in China and its association with preterm birth: a retrospective cohort study.
Journal of Obstetrics and Gynaecology
Large retrospective cohort of 2832 twin pregnancies demonstrates significant dose-response associations between weight gain z-scores and preterm birth with adjusted odds ratios and confidence intervals.
Reported
Sample size2832 twin pregnancies
Adjusted OR for low z-score and s…1.35
95% CI1.05-1.74