I found out at 6 weeks that I was having triplets. Saw the midwife at 9 weeks for my booking appointment and she didn't know that it was a multiple! I've just been sent an appointment to see the consultant in just over a week (by which thime I'll be almost 13 weeks), but still don't know when my next scan will be..... The midwife said that because I had 2 early scans, then I might not have one at 12 weeks, which I thought was a bit odd since triplet preganancies are regarded as high risk.
There doesn't seem to be any set procedure that's followed. If they think you need more regular scans then you'll have them, but some NHS trusts only start scanning more regularly later on in the pregnancy to monitor growth.
I'm really ready to have another scan now - My sickness and tiredness are starting to pass and I'm really worried that things aren't right, even though I'm not in any pain or anything, it seems like ages since I saw my babies last!