I have been to have my 20 week scan. I had it done at the hospital and it was just the normal type of ultrasound. A lot of people I know have been talking about their 3D scan. I was not offered a 3D scan and was wondering if it is something I have to organise myself or does it depend on the hospital??

Also, are there any other 'routine' ultrasounds after the 20 week scan? Nothing has been mentioned to me so far at my hospital appointments.
Thanks