eli5: why do women sometimes give birth to twins and triplets

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eli5: why do women sometimes give birth to twins and triplets

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Sometimes more than one egg is released at the same time and or the fertilized egg splits in two. https://www.youtube.com/watch?v=r5Guh_VbDnU

Their ovaries can sometimes release more than 1 egg (one example, 2 eggs), then if both eggs get fertilized, they get twins.

Women have two ovaries, and sometimes an egg will be released from each ovary at the same time. If both eggs are fertilised and develop successfully, you get fraternal twins.

Sometimes, a single egg is fertilised and during the cell division process it splits completely into two fetuses. This is when you get identical twins. They’re identical because they have precisely the same DNA, as they came from the same egg and sperm.

Triplets can sometimes be a combination of two identical and one fraternal twin – this is when both things happened at the same time. Two eggs were released, of which one split into two fetuses while the other developed into a single baby.