I'm going in today for my anatomy scan, I'm 18+3, and my doctor told me to schedule for any time between 18 & 20 weeks. She said 18 weeks on the dot would even be fine, but I see women saying 18 weeks is too early... then I see women saying they went at 17 weeks and it was successful. We already know the gender so that's not my concern, just wondering if everything will be developed enough and what your experiences have been!! :)