Little is known about the maternal-to-neonatal intrapartum transmission of COVID-19 via vaginal route. In this study, we report the adverse pregnancy outcomes in pregnant women infected with COVID-19 pneumonia and the risk of intrapartum transmission of COVID-19 via vaginal route. None of the three neonates were infected with COVID-19 delivered via natural birth. Only one neonate was delivered prematurely. No neonatal death and stillbirth were observed in pregnant women infected with COVID-19. Moreover, all of the neonates had normal birth weight, birth length, and normal Apgar score.