Areas include:

Reproductive endocrinology:
Menstrual cycle irregularities.
Premenstrual syndrome.
Polycystic ovary syndrome.
Menopause and premature menopause.
Hormone replacement therapy (HRT).

Osteoporosis:
Glucocorticoid-induced osteoporosis.
Postmenopausal osteoporosis.
Osteoporosis in anorexia nervosa and eating disorders.
Osteoporosis in men.

Thyroid Disorders:
Hypothyroidism.
Hyperthyroidism.
Autoimmune thyroid disease.

Parathyroid Gland Disorders:
Hypercalcaemia.
Hyperparathyroidism.
Hypocalcaemia.

Traumatic Brain Injury:
Pituitary disorders in TBI.