Diagnostic Accuracy of Transvaginal Ultrasonography and Serum β-hCG in the Diagnosis of Ectopic Pregnancy: A Systematic Review. Integrative Perspectives of Social and Science Journal, [S. l.], v. 3, n. 09 September, p. 524–531, 2026. Disponível em: https://ipssj.com/index.php/ojs/article/view/2038. Acesso em: 21 oct. 2026.