I used to refer to Liebling as "he" all the time in utero - just because it's the correct gender neuter pronoun. I prefered "him" to "it" anyway. Every now and then I'd throw a "she" into the mix because people thought I knew I was having a boy.

Unless the sentence was "well, he's certainly not got to worry in the changing room" or something along those lines I wouldn't take anything by it.