Sometimes techs will guess at the NT scan (if you opt to do one) but that's early...10-12 weeks. I wouldn't take much stock in a NT scan guess. My perinatologist won't take an official guess until 18 weeks.
If you get the new DNA tests, those will tell you definitively at 12-14 weeks
Re: How many weeks... To find out if its a boy or girl?
If you get the new DNA tests, those will tell you definitively at 12-14 weeks