ANATOMY

Detailed explanation-1: -Current knowledge indicates that females are born with their entire lifetime supply of gametes. At birth, the normal female ovary contains about 1-2 million/oocytes (eggs). Females are not capable of making new eggs, and in fact, there is a continuous decline in the total number of eggs each month.

Detailed explanation-2: -Because many eggs start to develop but die off before being ovulated, a woman goes through roughly 300, 000-400, 000 eggs in their reproductive years, but only ovulates 300-400 eggs. The average woman runs out of eggs and starts menopause around the egg of 52.

Detailed explanation-3: -Researchers say that the theory that female mammals are born with a fixed supply of eggs stems from studies that showed females develop a finite number of egg-producing follicles in their ovaries during fetal life, as opposed to males who continue to generate sperm-producing cells throughout their lives.

Detailed explanation-4: -When a baby girl is born, her ovaries contain hundreds of thousands of eggs, which stay inactive until puberty begins. At puberty, the pituitary gland (in the central part of the brain) starts making hormones that stimulate the ovaries to make female sex hormones, including estrogen.

Detailed explanation-5: -Women have a set number of eggs at birth, and that number gradually diminishes as they get older. By their first period, most women have about 300, 000 eggs on average. While it’s normal to have fewer eggs as you get older, some women may actually have a low egg count for their age.