My mother in law said this happened when my husband was a baby. His hair came back :)
My daughter lost all her dark hair and it grew back blonde xx
This is totally normal. Both of mine lost all their hair on the top at around 6 weeks. My daughters grew back fine and I can see the hair coming back on my little boy
My daughter also had this. I was worried as I thought it should only be at the back of their head but on the top is normal too. It also happened to my sister’s children so nothing to worry about. My daughter’s hair has just started to grow back too. She’s nearly 8 weeks old!
My son went completely bald, it's normal it all grew back
Just did a quick search as ours is going through something similar at the front; apparently it’s hormonal and should come back - says if it’s going out in patches and isn’t growing back by the 1st birthday then it’s something to contact doctors about x