It depends greatly on your clinic and individual circumstances.

My clinic stops progesterone support at 4 weeks, while others continue to 12 weeks and beyond. When it comes to blood tests, I only had the one. If levels come back between 10 and 100 they will bring you back for a second test two days later. Anything over 100 and they are completely happy and only bring you back for a scan around 6 weeks. Anything under 10 is a flat out BFN. I've heard of other clinics that are happy with anything over 50, and still others that monitor HCG levels regardless of the starting point for those first few weeks before the scan.

BW