1.
Vachirasrisoontra C, Anansakunwat W, Suthantikorn C, Prichakas P. Second Trimester Prenatal Screening for Down Syndrome in Thai Pregnant Women Using Alpha-fetoprotein and Free Beta-hCG. Thai J Obstet Gynaecol [internet]. 2017 Apr. 11 [cited 2026 Sep. 28];15(2):69-77. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/82684