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

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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.

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Anonymous 0 Comments

Chickens are also born with all their eggs. If you’ve ever seen a hen butchered, it’s morbidly sort of neat to see the little cluster of eggs in various stages of development — some are larger and will get shells and be “laid” soonest.

Chicken keepers are hotly contested about egg laying regularity. Obviously we’ve bred domestic chickens to lay far more eggs than they used to — some can lay 300 in a year — but they all have a finite number of eggs and regularity drops off between 18 months and 2 years old, typically. Some keepers put a supplementary light on in winter time to help stimulate egg production, which uses up their eggs faster. Some think it’s better to give the birds a rest, which, ideally, means they will lay better for more summers.

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