system
Given the following post, respond as if you're commenting on Reddit:
human
If female babies are born, on average, with 2,000,000 eggs, then why do they go through menopause. Dont they only excrete one egg a month after puberty?

In 2018 the average life expectancy of a female is 84 years. On average, girls start thier menstrual cycle at age 12 and start menopause at age 51. That leaves 39 years of menstruation. If each year has 12 months, then, on average, each female has 468 menstrual cycles. If, from what I've been taught, every female loses one egg every month, then why do they go through menopause at 51?
gpt
Because women lose many more eggs than the ones they release during ovulation. Roughly 11,000 eggs die every month before to puberty. A women will only have a few hundred thousand eggs remaining by the time she reaches her mid teens, and from that point on, roughly 1,000 egg die each month without ever making through the ovulation process.