eli5: how are human girls already born with all the eggs they’ll ever have?

Question

I’ve seen videos showing the scale of a human egg and it’s visible to the naked eye- it’s definitely not as small as i thought it would be. So how are girls born with millions of eggs already? Im thinking that large of an amount would take up a considerable amount of space. And how do girls lose eggs from birth if they dont have their first period til adolescence? Since im assuming eggs are mainly lost through periods, excluding trauma or ovarian disorders.

In: 31

Answer 1

There’s evidence that this isn’t true. It was discussed recently on an episode of The Weirdest Thing I Learned This Week: https://open.spotify.com/episode/7Gba7EJltawMBTNMOFSOxV?si=W2J5v7LTTm60048ORPrWHg