Nishimura Y, Homma C, Hirama C, Iwahata Y, Iwahata H, Furuya N, Kondo H, Hasegawa J, Suzuki N. Fetal Intra-abdominal Umbilical Vein Varix: Prenatal Sonographic Diagnosis and Delivery Management. Donald School J Ultrasound Obstet Gynecol 2022; 16 (2):153-156.