ovulation and it was my best cycle for how I felt and my lining was 12 to 14 in places....and it was successful too.
our previous FET was with LUPRON and although it as a successful cycle and my lining was 11...IT DIDn't feel as natural...although I don't have any adverse reactions to lupron...I just felt better without it on our recent FET.
With our fresh cycle we did use lupron..my lining was a nice 10...but even though we transferred 2 perfect blasts it was a chem m/c result.
I remember being really worried that I would be one of those women who ovulate even through the estrace but nope...it was great...they monitored me and we started the progesterone right around the time that I would normally ovulate...it was very smooth and this was working with my clinic from a distance too.
Anyway...I'm now a big believer in natural cycles and of couse it is less expensive as well...even though my insurance covers the meds...anything I can save them I think makes a difference on our premiums as a whole.
Blessings from Hope