Estradiol is the most important form of the hormone estrogen. Doctors may order an
estradiol test if a girl appears to be entering puberty earlier or later than expected,
or to evaluate menstrual problems.
Doctors may order a DHEA-S test if boys or girls show signs of sexual development
earlier than expected. It can rule out certain diseases of the testes or ovaries,
or help diagnose damage or disease of the pituitary gland.