D, S. J.; G., V.; RAI, R.; BANU, R.; ., J. COVID-19 second wave deadlier than first in pregnant women: a comparative observational study and the COVID saga continues. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 10, n. 10, p. 3909–3914, 2021. DOI: 10.18203/2320-1770.ijrcog20213860. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/10734. Acesso em: 2 oct. 2025.