eli5 What is a miscarriage? Doctor malpractice involved? Just bad luck? Does the baby always die? Does the mom always die? Bad health choices?
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Lots of early pregnancies end, because they’re essentially misfires. The fetus (or even zygote) isn’t forming properly, so the body decides to give up and start over again.
Growing a baby takes a tremendous amount from the mother’s body and makes her vulnerable for an extended period of time. The human body can only afford to spend that sort of effort on a fetus that is likely to survive, so we’ve evolved a mechanism to end nonviable pregnancies before they can consume too much of the mother’s resources.
To be fair, that’s not what I’d say to a 5yo 😅
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