Most likely your endo will do bunch of tests first to rule out some obvious secondary causes for op. Here is what I had:

The first set of blood work my endo ordered were:

Vit D
24hr urine calcium w/ creatinine
Parathyroid hormone
Celiac disease diagnostic panel
Basic metabolic panel
AM cortisol level
Dexamethasone challenge (1mg o/n), test 8-10am

Later we did:
Plasma histamine
Prolactin level
Serum electrophoresis
Tryptase
Magnesium level

During FORTEO we did:

Periodic Vit D check (~every 3-6mo) and metabolic panel

Monitor blood calcium @3mo, 6-9mo forteo: metabolic panel includes this

I didn’t have baseline btms, but started at one year and now doing every 3mo. Trending very nicely

After all the tests came back, we think I have op due to loss of estrogen.

Oh I think thyroid hormone t4 and tsh needs to be checked. if you had or having certain meds such as ssri, ppi, oral corticosteroids or ai etc, tell your doc. Other disease states like ibs also can be a cause. My doc took a detailed medical and family history. @windyshores had a long list of causes posted somewhere on this forum.

If I could locate the full list of dx labs for most causes for op, I’ll post it here.