Fertilization to childbirth

Apuntes

**Fertilization to Childbirth** • Subtopic: Fertilization Process 1. **Cervical Mucus:** Protects the uterus from pathogens and sperm when not in the fertile window. During ovulation, it becomes thinner and less acidic to help sperm swim through. *Colonal Radiata:* The outermost layer of cells surrounding the egg, providing protection and nourishment. Sperm must pass through this layer to fertilize the egg. 2. **Zona Pellucida:** The outer shell of the egg that prevents multiple sperm from entering once fertilization occurs. It also 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 Development and Fertilization Mechanics** The endometrium is the inner lining of the uterus where the blastocyst implants and receives nutrients. It supports the embryo during its early development. The placenta is an organ that forms after implantation, supplying oxygen and nutrients to the fetus while removin...