I found out really early, maybe 12 or 13 weeks because of the blood test where they search for chromosomal deformities etc. Generally without that I'd find out at my anatomy scan next week, 19 weeks :)
Depends, do you know if you’ll be having an ultrasound done at that appointment? I found out at 15 weeks through an elective ultrasound place, because my doctors office doesn’t do a gender ultrasound until 20 weeks at the anatomy scan.