Incidence of ectopic pregnancy at the "Enrique C. Sotomayor" gynecological-obstetric Hospital from 1985-1990. Revista Universidad de Guayaquil, [S. l.], v. 82, n. 3-4, p. 53–94, 1990. DOI: 10.53591/rug.v82i3-4.577. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/715. Acesso em: 5 dec. 2025.