Hi! Congratulations btw! This is a behavior called “rooting” I believe. They will do this to comfort themselves and is also a bonding mechanism as babies love the scent of their mothers and warmth. Your heartbeat is sometimes just soothing to them like in the womb so she could be trying to calm herself to sleep? Also, as their skin adjusts to being outside the womb, it could also be a way of itching. Babies will similarly do this to try and find their way to a nipple to feed.

11

This is so cute! I think it’s because they’re either hungry or soothing themselves

4