Pestana Sierra, C.; Pérez-Velilla, M. A.; Samudio-Domínguez, G. C. Anembryonic Pregnancy. Presentation of Case With Spontaneous Expulsion of Empty Egg. Mem. Inst. Investig. Cienc. Salud 2024, 22 (1). https://doi.org/10.18004/mem.iics/1812-9528/2024.e22132404.