So I had a mock transfer and saline investigation today. They managed to get the saline catheter through but not the mock transfer one (or any of them) which is different. So it looks like I'll need dilation. A bit annoyed that the clinic didn't explain more about when this will all happen etc following the investigation. I think it will delay things. I've read that you should wait for 1-3 months afterwards before the ET. I guess it's just a little while longer in the grand scheme of things. I wish they'd done all this in the first place. Has anyone else had dilation? Do your clinics routinely do mock transfers?