Nulliparity is considered to be a risk factor of preterm birth (PTB), low birth weight (LBW) and small for gestational age (SGA). With the new two-child policy launched in 2016, more Chinese women have delivered their 2nd baby. Yet few studies have assessed the impact of parity on adve...
Women’s ages were restricted to ≥18 years, and the recorded gestational age at birth was ≥20 + 0 weeks. Figure 1 shows the patient selection process. Figure 1. Study cohort flowchart. The antenatal lifestyle education intervention is a free, face-to-face, midwife-led group program ...