aboutkidshealth.ca

jNrZQ TIL newborns don’t shed tears. Tear ducts don’t fully develop in infants until they are one to three months old, making it impossible for babies to shed actual tears.
9kLB TIL there’s a valve in fetal hearts that diverts blood away from the lungs while in utero. It begins closing at the first breath as the baby gets oxygen from it’s own lungs for the first time.