My wife has: an irregular menstrual cycle (2 3 per year); thinning hair; but normal thyroid lab results. age 30. what is the next step? thanks!

More work up: There are a couple possibilities. There are other causes for these symptoms other than thyroid disorders., adrenal problems, an endocrine disorder called pcos, and nutrtional deficiencies are other possibilities . She could see either her primary physician, an endocrinologist or a functional medicine specialist to have this looked into further and i would strongly recommend that she do this

Additional evaluat: There are several other medical problems for regular menses other than thyroid issues. She needs to be evaluated by gynecology, for further evaluation