Sneak peek wrong?

Amy • Mom to 4 beautiful girls. 3/3/10, 4/27/14, 4/8/17, 3/7/19.

I know getting a girl result is far more accurate than the boy results, but I was just curious if anyone has gotten a false girl result and if so how far along? I took mine at 14 weeks which furthers my thinking this is correct. I’m sure it’s right as girls is all I seem to produce, just curious though.