I booked mine in myself for 7th Oct.
I have a shite immune system to trnd to pay to have it done most years anyway.
I had it with my 1st too. They offer it in oct/nov time so just depends at what point you are in your pregnancy when you end up having it xx
I think I had mine after my 12 week scan with my last pregnancy. Literally had my scan, they gave me a leaflet and asked if I wanted it done and if I did just to fill out the little form give it back and then wait outside the room. Waited all of 10 seconds and had it donexx