Many have taken to the comments to coo over the baby or crack jokes about his rather serious expressions. "This isn't his first life, he's like 'seriously? I'm back again?" Megan Genevieve wrote.

(baby cooing) - Right, so when you take him out, make sure you wrap him up tight. Don't forget his hat and his mittens, not too tight mind. And watch him getting flushed and hot. Nappies are in here.

Copying the early noises your baby makes lets them know you're listening to them. It also gets them used to the back and forth rhythm of conversation. So listen out for their noises and make them ...