How Babies Breathe in the Womb: Fetal Lung Development - What to Expect
https://www.whattoexpect.com/pregnancy/fetal-health/how-babies-breathe-womb
WEBJul 19, 2021 · How do babies breathe in the womb? Although babies do practice breathing movements in the womb to train their muscles, they don’t actually breathe in oxygen and breathe out carbon dioxide like you do. Instead, oxygen and carbon dioxide exchange happen via the umbilical cord and placenta.
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