Eggs - women - books

I was in a book shop the other day and I starting thinking about the link between the biology books (I was looking for a book for my son's school work) to the women around me in the shop.

I estimated about 50 women on the two floors of the shop - according to the biology book each woman is born with around 400'000 eggs. Of these about 450 are actually used (to be fertilised or as waste during their periods).

Here is the maths;

50 times 400'000 is 20'000'000

50 times 450 is 22'500

so just the women in the same shop as I was, have the potential to generate, using artificial means, the whole population of Australia or naturally as the Swiss town of Montreux!!