Oogenesis

Oogenesis is the process of egg cell formation in vertebrates. It is a complex and crucial process that allows animals to produce the gametes necessary for fertilization. Oogenesis involves many stages of cell division and differentiation to produce an egg cell with a haploid set of chromosomes in humans. During oogenesis, the female germ cells (oogonia) divide via mitosis to produce primary oocytes, which then go through a series of meiotic divisions. These meiosis stages produce secondary oocytes, which contain polar bodies and a haploid egg cell, called an ovum. The ovum is released from the ovary during ovulation and is then able to be fertilized by a sperm cell. Oogenesis is essential for reproduction and is how genetic information is passed from one generation to the next.