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Facts about Female Egg Supply and Menopause
Females are born with approximately one million eggs, which decrease significantly throughout life. By the age of 30, only about 10% of the original egg supply remains, dropping to just 3% by age 40. The decline in egg quantity impacts fertility and increases the likelihood of chromosomal abnormalities in pregnancies. The ovaries, part of the endocrine system responsible for hormone production (including estradiol, progesterone, and testosterone), age at a rate twice that of the rest of the body. As women approach perimenopause and then menopause, which typically occurs around age 51, the number of eggs diminishes to zero, leading to the cessation of menstrual cycles and a significant reduction in sex hormone production.