I'm a bit of a fence sitter on this one....

With DS I had a scan at 18 weeks & another at 32 weeks. I would have been happy with just the 18 week scan, but the 32 week one was due to an suspected amniotic fluid issue.

With DD I had scans at 7 weeks, 19 weeks, 28 weeks & 37 weeks. The first was because she was an IVF baby & it is part of my clinic's protocol to make sure bub is in the right place. The 28 & 37 week scans were because the midwives thought she was small & the doctors thought she was big (conflict there? LOL) but she was sot on for dates at both. I don't think either of those were necessary at all & given the choice I wouldn't have them again.

With my third pregnancy I had just the one scan at 9 weeks 5 days. I was measuring at 12 weeks and my dates were uncertain, so my doctor sent me for a scan to check for twins or if I was further ahead (which was a possibility because of my previous cycle). At the appointment I was going to ask him to send me for a scan if he didn't order one, because I had a dreadful feeling that something was wrong. Sadly I was right Put in the same situation I would absolutely have another scan to set my mind at ease or to find out bad news sooner rather than later.

For future pregnancies my doctor has recommended an early scan to make sure all is ok because of the miscarriage I had in January. I'm happy with that because I have bad anxiety until I feel movement which I supsect will be worse now given that we have lost a pregnancy.