How do you approach continuing vs discontinuing ovarian suppression for high risk HR+ breast cancer when a patient becomes post-menopausal?

I'm assuming this is a woman in her late 40's or preferably over 50 (I wouldn't trust that a younger woman was permanently postmenopausal no matter what the clinical and lab picture is). It can be challenging to determine that a patient on ovarian function suppression (OFS) is actually post-menopaus...