KRISHNAMOORTHY, N.; KASINATHAN, A. Knowledge and attitude regarding obstetric ultrasound among pregnant women: a cross sectional study. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 5, n. 7, p. 2192–2195, 2017. DOI: 10.18203/2320-1770.ijrcog20162091. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/1327. Acesso em: 29 dec. 2025.