Data were presented as n (%); RR: relative risk, CI: confident interval, AZ: Astra Zeneca, Pf: Pfizer-BioNTech, p: Birth weight percentile
*included 2 stillbirths (1 at 24 2/7 weeks and 1 at 26 6/7 weeks)
**included 1 stillbirth (at 37 0/7 weeks)