It’s just a normal thing all kids do. My daughter started doing it after I tested negative after a miscarriage so I don’t put stock into it
My baby is been doing this since she can sit up at 5 months and here we are at 8 months still no baby lmao
My baby started doing this as soon as I got my IUD removed a couple months ago but I think it’s literally just a “tale”, doesn’t mean anything.