A 30-year-old woman presents with irregular periods and difficulty becoming pregnant. She also reports constipation, dry skin, and hair loss. What could be the potential causes, and what are the next steps?
The symptoms of irregular periods, difficulty with fertility, constipation, dry skin, and hair loss could suggest hypothyroidism. Other potential causes include polycystic ovary syndrome, premature ovarian failure, or a pituitary disorder. The next step would be to check thyroid function tests, including serum TSH and free T4 levels.