Here was my timeline. I saw Dr. Frankfurter at GW.
July 2014 - called to make appointment
September 2014 - had appointment (first opening)
HSG sonogram, blood work, IVF class
December 2014 - first retrieval and transfer - failed
March 2015 - second retrieval, freeze all
May 2015 - FET, pregnant
January 2016 - DD born
Hope this helps!!!
A lot depends on what you mean by "treatment" - does that mean an actual transfer or something else? Because an actual transfer can end up taking a lot longer if the RE finds something else that needs to be dealt with (a polyp, fibroids, something else).