I was 11 weeks 5 days when my ob said it was a boy. Then at 18 weeks confirmed 100 percent boy

My doctor had a blood test I could take I found out what I was having around that time.

I don't think so. I even had a 3d ultrasound at 10w3d and you couldn't see anything!! lol

I did at 12 weeks for one of my twins the other wouldn't cooperate.

I didn't because that's way too early. 11 weeks is when they are beginning to form. I went in at 14 weeks and my doctor said possibly a boy, but he's not 100% certain because 14 weeks is still too early.