Purnasari, Ratih Hermas, Yulia Lanti Retno Dewi, and Bhisma Murti. “Risk of Premature Birth in Pregnant Women Infected With COVID-19: A Meta Analysis”. Journal of Maternal and Child Health 7, no. 1 (January 16, 2022): 22–33. Accessed December 10, 2024. https://thejmch.com/index.php/thejmch/article/view/713.