COVID-19(35) SARS-CoV-2(27) Pregnancy(19) coronavirus(9) pregnancy.(8) Infection(8) Asymptomatic(7) Neonatal(6) Childbirth(5) outcome(5) lymphocyte(5) pregnant women(5) Neonate(5) morbidity(5) COVID-19 infection(5) drug(4) Oxygenation(4) antimicrobial(4) Breastfeeding(4) maternal and perinatal outcomes.(4) Severe case(4) outcomes(4) Course(4) PCR(4) form(4) Mild(4) Anemia(4) CPAP therapy(4) disease(4) prospective observational study(4)