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Zhang, Meixiang, et al. "Intrauterine Transmission of SARS-CoV-2 to and Prenatal Ultrasound Abnormal Findings in the Fetus of a Pregnant Woman with Mild COVID-19." BMC Pregnancy and Childbirth, vol. 23, no. 1, 2023, pp. 1-7, https://doi.org/10.1186/s12884-023-06053-y.