8. Fecundación e implantación Paso del espermatozoide a través de la corona radiada Penetración en la zona pelúcida Fusión de membranas celulares Conclusión de la 2da división meiótica Formación del pronúcleo femenino Formación del pronúcleo masculino Rompimiento de membranas entre núcleos
49. Bibliografia Moore Keith L. en “Embriologia Clinica” 6ta edicion, Mc Graw-Hill Interamericana 1998. pag 18-46. Langman “Embriología Medica” 6ta edición Editorial Panamericana www. Embriología del desarrollo.com
Notas del editor
Figure 1. Blastocyst Apposition and Adhesion. The diagram shows a preimplantation-stage blastocyst (approximately six to seven days after conception) and the processes thought to be necessary for uterine receptivity and blastocyst apposition and adhesion. COX-2 denotes cyclooxygenase-2, EGF epidermal growth factor, and LIF leukemia inhibiting factor.
Figure 2. Blastocyst Implantation. The diagram shows an invading blastocyst (about 9 to 10 days after conception) and the processes necessary for trophoblast invasion.
Figure 3. Maintenance of Early Pregnancy. The diagram shows an implanted embryo (approximately 14 days after conception) and the processes necessary for the maintenance of an early pregnancy. VEGF denotes vascular endothelial growth factor, and hCG human chorionic gonadotropin.