You can find out as early as 14 weeks. If your doctor doesn't tell you you can go get a 3D ultrasound and they can tell you the gender.
my doctor said I was going to get a call for the anatomy scan since 3 weeks ago. and they just give me the run around :/
I will be 22 weeks on Friday and still don't know ether. My clinic keeps telling me next week and next week. So I will go pay to know the gender. !
I did mines last week and found out I'm having a boy