"Among 827 registry participants who reported a completed pregnancy, 104 experienced spontaneous abortions and 1 had a stillbirth. A total of 712 pregnancies (86.1%) resulted in a live birth, mostly among participants who received their first vaccination dose in the third trimester. Among live-born infants, the incidences of preterm birth (9.4%), small size for gestational age (3.2%), and congenital anomalies (2.2%) were consistent with those expected on the basis of published literature. There were no neonatal deaths. These are reassuring data based on reports from pregnant women mostly vaccinated in the third trimester."

https://www.nejm.org/doi/full/10.1056/nejme2107070