Abstract
WHAT IS ALREADY KNOWN ABOUT THIS TOPIC? With socioeconomic development, the increase of older pregnancies and multiparas has brought risks to mothers and infants. WHAT IS ADDED BY THIS REPORT? As parities increased, the proportion of women of advanced maternal age (AMA) and non-local domicile increased, while the proportion of women with higher education levels decreased. Women with ≥3 parities are more likely to have preterm birth (PTB) and macrosomia. WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE? A comprehensive analysis of pregnancy traits among women at different parities offers a robust foundation for tailored strategies against adverse pregnancy outcomes.