RUANGCHAINIKOM, W.; SARAPAK, S. Ultrasonographic Fetal Ear Measurement in Predicting Fetal Chromosome Abnormality. Thai Journal of Obstetrics and Gynaecology, Bangkok, Thailand, v. 13, n. 3, p. 147–150, 2001. Disponível em: https://he02.tci-thaijo.org/index.php/tjog/article/view/256529. Acesso em: 1 oct. 2026.