Those places are always just so confident, cause no one would pay them if they were honest about the statistics.
Expecting mother boards are FILLED with women who, like Colleen, just couldn't wait until the anatomy scan to find out the sex (because in another one of Colleens extreme privilege moments that she fails to acknowledge, that genetic testing is expensive, and in most people's cases, insurance does not cover it unless the doctor deems it medically necessary. My insurance covered it and it still cost me $700 out of pocket) so they go to one of these places, pay $100 or whatever to have someone tell them the sex, only to find out it's completely wrong at the anatomy scan.
There's a reason Colleens doctor was going to have her wait another month to find out the sexes of the babies.