An egg cell, or ovum, is the female reproductive cell in many organisms, including humans. It is one of the largest cells in the body and plays a crucial role in reproduction. When fertilized by a male sperm cell, the egg can develop into an embryo, leading to the formation of a new organism. Egg cells are produced in the ovaries and are released during a process called ovulation. Each egg cell contains half the genetic material needed for reproduction, contributing to the genetic diversity of offspring. The health and quality of egg cells are important factors in fertility and reproductive success.