When baby takes their first breath, the lungs inflate with air as the amniotic fluid is pushed out, explains Ross. “Once air and oxygen enter the lungs at birth, the normal breathing process begins,” she says.
According to the National Library of Medicine, baby takes their first breath within about 10 seconds after delivery: “This breath sounds like a gasp, as the newborn’s central nervous system reacts to the sudden change in temperature
and environment.”