JEDDI, S. Z.; MOBARAKI, N.; PIRZADEH, A. Transvaginal ultrasound compared with serum β-hCG level for diagnosis of ectopic pregnancy in symptomatic patients. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 9, n. 3, p. 1228–1233, 2020. DOI: 10.18203/2320-1770.ijrcog20200905. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/7974. Acesso em: 4 dec. 2025.