Why Do Babies Sleep with Their Hands up?

It's Part Of Their Moro Reflex

If you've ever witnessed your sleeping baby suddenly startle and fling their arms up in the air, then you've seen the Moro reflex in action. As explained in a study of the same name, the Moro reflex is a completely normal reflex in full-term babies.

Why babies keep their hands up?

Their fists are clenched, with arms bent and legs held close to their body. This typically isn't anything to worry about — it's the natural fetal position they've been used to in the womb. But you may start to wonder why your baby clenches their hands so much.

Why do babies hold their hands while sleeping?

Your baby isn't trying to tell you that he loves you when he holds your hand, though he certainly does. Instead, this is an instinctive reaction developed centuries ago as the human body developed. It's okay to let your guests feel special though. Is Your Baby Getting Enough Sleep?