20weeks and grunting

Emma

My LO recently started grunting at random times. No matter if I hold him, lay him down, sit him up, he will grunt and grunt and grunt. I’m not too worried about it cause he can breath fine and everything else but just wondering if anyone else’s little one went through this? He only stops if I stand him up in front of me then he will laugh and play. So I’m thinking he’s doing it to grab someone attention.