Shirchinjav, Altantuya, Bolormaa Tovuudorj, and Erkhembaatar Tudevdorj. “Contribution of Fetal Tricuspid Regurgitation in First Trimester Screening for Major Cardiac Defects in Ulaanbaatar”. Central Asian Journal of Medical Sciences 3, no. 3 (November 25, 2017): 306–310. Accessed October 27, 2025. https://test.mongoliajol.info/CAJMS/article/view/2730.