Fertilization to childbirth

Apuntes

• Subtopic: Fertilization Process Fertilization to childbirth 1. Cervical mucus: Protects the fetus from pathogens and sperm when not in the fertilization window. During ovulation, it becomes thinner and less acidic to help sperm swim through. *Column Radiata: The outermost layer of cells surrounding the egg, providing protection and nourishment. Sperm must pass through this layer to fertilize the egg. *Zone Pellucida: The outer shell of the egg that prevents multiple sperm from entering. Once fertilization occurs, it changes to block other sperm. *Ampullary-isthmic junction: A specific location in the fallopian tube where fertilization occurs. The egg waits here for sperm. *Acrosome: A cap-like structure at the tip of the sperm that releases enzymes to break down the zona pellucida and allow sperm entry into the egg. --- • Subtopic: Early Embryonic Development Endometrium: The inner lining of the uterus where the blastocyst implants and receives nutrients. It supports the embryo during early development. Placenta: An organ that forms after implantation, supplying oxygen and nutrients to the fetus while removing waste through the umbilical cord. 2. Sperm can survive up t...