"Women are born with a finite number of eggs. At birth, a woman has around 1 to 2 million eggs. However, throughout her life, a woman loses eggs through a destructive process called atresia. At puberty, only around 400,000 eggs remain. Throughout the reproductive life span, from puberty until menopause, women lose about 1,000 eggs each month. Of these thousand eggs, only one is released. Once released, it is picked up by the fallopian tube. If a couple has sexual intercourse around this time, fertilization (the joining of the egg and sperm) may take place."
So, actually, we're born with one or two million eggs in our ovaries. When we go through menopause that simple means we have used those eggs up and there is nothing left to be fertilized. Some women begin menstruation earlier than others just like some women go through menopause earlier than others.
It is pretty neat to find out that we lose a whole bunch of eggs between birth and our first menstruation though."
& You might want to read the question there too, as it has a few little details about average menstrual cycle age and whatnot. [ Peeps's advice column | Ask Peeps A Question ]
Attention: NOTHING on this site may be reproduced in any fashion whatsoever without explicit consent (in writing) of the owner of said material, unless otherwise stated on the page where the content originated. Search engines are free to index and cache our content. Users who post their account names or personal information in their questions have no expectation of privacy beyond that point for anything they disclose. Questions are otherwise considered anonymous to the general public.