COVID-19(18) Ultrasound(17) Society(17) SARS-CoV-2(17) Gynecology(17) acute respiratory syndrome(16) coronavirus(16) Pregnancy(15) pregnant women(14) positive(14) polymerase chain(13) Evidence(12) Infection(11) women(11) coronavirus disease(11) obstetrics(11) polymerase chain reaction(10) affected(10) carried(10) Chain Reaction(10) acute respiratory syndrome coronavirus(10) risk(9) death(9) Analysis(8) placental(8) SARS-COV-2 infection(8) association(8) Placenta(8) occurred(7) fetal(7)