I don't think there is anything wrong with it, but if your concerned I would ask your doctor...
I get my eyebrows threaded and there's nothing wrong and im due in 4 days. I ain't having bushy eyebrows
I see no way at all it could cause a problem.
I have always thread my brows and all my baby's are fine lol
Your allowed wax but I dunno what threading is x
Cant see any reason why not and never heard to avoid either :) done it my self my boy its ok and he have eye brows lol xx