PESTANA SIERRA, Cristian; PÉREZ-VELILLA, María Adela; SAMUDIO-DOMÍNGUEZ, Gloria Celeste. Anembryonic pregnancy. Presentation of case with spontaneous expulsion of empty egg. Memorias del Instituto de Investigaciones en Ciencias de la Salud, [S. l.], v. 22, n. 1, 2024. DOI: 10.18004/mem.iics/1812-9528/2024.e22132404. Disponível em: https://revistascientificas.una.py/index.php/RIIC/article/view/3823. Acesso em: 8 nov. 2026.