Does your doc post his statistics on the SART website? Many of them do and they post what their percentage of cancellations are. It varies in our area from 3-8%. It is not that common, at least based on those statistics. I wonder what the experience among this group of women has been.
Your post inspired me to check the success rate for my clinic again. They did not have single cancellation in my age group since 2007 and only 2-4 per year in all age groups. I just messed up their streak
Me 30 & DH 38 - Married 02/21/2003
TTC #1 since March 2008
1st IVF - February/March 2012-Cancelled due to low response
2nd IVF - March/April-BFN
Surprise natural BFP on Mother's Day 5/11/2014
I think it should make you feel confident that next time is going to work. Also, these things do happen. I wonder how their cancellations are by diagnoses. I would think that might play a larger factor than age. i.e. I expect cancellations to be low for endometriosis but higher for premature ovarian failure or PCOS. Just a thought. Regardless, you're in my thoughts and prayers. People do have cancellations. And your clinic has a good track record.