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 Journal of Obstetrics and Gynaecology, Bangkok, Thailand, v. 15, n. 2, p. 69–77, 2017. Disponível em: https://he02.tci-thaijo.org/index.php/tjog/article/view/82684. Acesso em: 1 oct. 2026.