Thanks everyone

The reason I was asking was to determine the day that you can reasonably determine an IVF cycle hasn't been successful through hpt testing.

For instance, if, say the average HCG at 14dpo (whether that be 9dp5dt or 11dp3dt) is 100, then going by the theory HCG doubles every 48 hours or so, then if you get a bfn on a 10mui hpt on 10 or 11 dpo or later, then there's a very, very good chance that the cycle has not been successful.