I read that it was around 18 weeks? That's when DH started reading to my belly every night, and I started playing piano to bub

Unfortunately tho with #2 I think all she heard was me telling DS to stop climbing on the kitchen bench and to put his toys away etc etc. LOL. She had a very different experience in the womb I think! LOL. She also got lots of kisses from her big brother though

ETA: Oh, and I remember I once at my SIL's she switched on her antiquated LOUD food mixer thing, and the baby did a massive flip! I had to leave the room for him to settle down LOL.