at how many weeks can they tell you what your having?

I found out @ 14 with a 3D ultrasound

I found out at 13 weeks 3 days

I found out at 20 with a regular ultrasound

i have an appointment when im 11 wks and 4 dys then when im 16 weeks and 1 day you think i could find out at my 1st appointment

I found out at 17 weeks via ultrasound

I found out at 12 weeks 6 days

12 weeks 6 days

I found out at 11 weeks there a test called panaramic its a blood test

I found out with 4d us @ 13 weeks