BHATTARAI, A.; BARAL, G. Yolk sac diameter as a prognostic factor for first trimester pregnancy outcome. Nepal Journal of Obstetrics and Gynaecology, [S. l.], v. 15, n. 1, p. 39–42, 2020. Disponível em: https://www.nepjol.info/index.php/NJOG/article/view/29339. Acesso em: 26 oct. 2021.