VAFAEI, H.; RAFEEI, K.; MARYAM DALILI, M. D.; ASADI, N.; SEIRFAR, N.; AKBARZADEH-JAHROMI, M. Prevalence of single umbilical artery, clinical outcomes and its risk factors: A cross-sectional study. International Journal of Reproductive BioMedicine (IJRM), v. 19, n. 5, p. 441–448, 23 Jun. 2021.