Main Findings
We present a comprehensive profile of the antibody responses to SARS-CoV-2 in both symptomatic and asymptomatic pregnant woman. Our finding of anti-SARS-CoV-2 IgG antibodies in umbilical cord blood raises the possibility that passive immunity was established in babies born to mothers with a history of SARS-CoV-2 infection. Our longitudinal analysis reveals key temporal features and adds additional information about the course of the virus in pregnancy.