US /lə'nju:goʊ/
・UK /lə'nu:gəʊ/
He was a teeny tiny little blonde guy when he first arrived with his premature lanugo coat, and he has now shed that, most of it.
He's still got a little bit of lanugo pants at the very back, but he has turned into a beautiful little seal.
This is called lanugo and plays a critical role in protecting the fetus from damaging substances found in amniotic fluid.