- Differentiate primary and secondary amenorrhea
- Differentiate primary hypofunction and secondary hypofunction
- Identifying true or false precocious puberty in prepubertal children
- Increase : Polycystic Ovary Syndrome / Turner syndrome/ Primary hypogonadism / Premature ovarian failure / Menopausal syndrome or menopausal women
- Decreas : Long-term use of birth control pills / Use hormone replacement therapy