Acácio, Gregório Lorenzo, Ricardo Barini, Walter Pinto Júnior, Renato Luís Silveira Ximenes, Heverton Pettersen, and Marcos Faria. 2001. “Nuchal Translucency: An Ultrasound Marker for Fetal Chromosomal Abnormalities”. São Paulo Medical Journal 119 (1):19-23. https://periodicosapm.emnuvens.com.br/spmj/article/view/2739.