I wasn't actually even given an option by my doctor, he just handed me the forms and said this is for your blood test at 10 weeks and your scan at 12 weeks.

I had my NT scan last Saturday. It was a relief to have it done, particularly as I had such good results. I didn't realise how concerned I was about something being wrong until after we had the scan. My mum even commented on how much more relaxed and happy I sounded when she spoke to me.