RT, ah ok I see. If you dont mind me asking, do you have thyroid issues usually or they just want to rule it out ahead of you going for FET? And I am curious about them testing your progesterone levels during the mock cycle as I asked if they would do blood tests to check progesterone levels during an actual cycle (as some clinics do) but the doctor said it's unnecessary as the progesterone given in the meds is way more than enough to sustain pregnancy. I know individual circumstances can vary though based on medical history etc.