Sonographic evaluation of umbilical cord thickness in monochorionic diamniotic twin pregnancies - Nunes, Clarissa Moraes; Biancolin, Sckarlet Ernandes; Miyadahira, Mariana Yumi; Peres, Stela Verzinhasse; Carvalho, Mario Henrique Burlacchini de; Francisco, Rossana Pulcineli Vieira; Brizot, Maria de Lourdes (Prenatal diagnosis, 2022)