Mishra S, Natu N, Chandwaskar N, Dhakar BP, Kosta S. Comparative Study of Maternal Mortality in SARS-CoV-2 Infected Pregnant Women in the First and Second Waves of COVID-19 Pandemic in Tertiary Care at Madhya Pradesh, India. J South Asian Feder Obs Gynae 2022; 14 (4):400-403.