You've tracked ovulation. Taken the supplements. Timed everything. You've had the bloodwork, and you've been told it all looks "normal."
Now IVF is on the table, and you still don't know why you're not pregnant.
IVF may well be the right next step. But you shouldn't have to make that call with that question still open. F.A.S.T. is a doctor-run look at four hormones across your cycle, so you decide knowing what your body is actually doing.
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Below: exactly what F.A.S.T. tests, what it can tell you, and what it can't. Press Start my protocol to open it.