Incidence of ectopic pregnancy at the "Enrique C. Sotomayor" gynecological-obstetric Hospital from 1985-1990. Revista UG [Internet]. 1990 Dec. 23 [cited 2025 Dec. 16];82(3-4):53-94. Available from: https://revistas.ug.edu.ec/index.php/rug/article/view/715