Marsis IO. Down Syndrome Screening Using Nuchal Translucency Thickness and Nasal Bone Eximination of Fetus at Maternal Age >= 35 Yearss. MK-UKI [Internet]. 2021 Mar. 24 [cited 2025 Mar. 15];25(1):1-6. Available from: http://ejournal.uki.ac.id/index.php/mk/article/view/2748