Precocious puberty - the onset of signs of puberty before age 7 or 8 in girls and
age 9 for boys - can be physically and emotionally difficult for children and can
sometimes be the sign of an underlying health problem.
Follicle stimulating hormone (FSH) plays an important role in sexual development.
An FSH test to measure the level of FSH in the bloodstream may be done if a boy or
girl appears to be entering puberty earlier or later than expected.
A testosterone blood test may be done if a boy appears to be entering puberty earlier
or later than expected, or to check for damage or disease of the testes or ovaries,
adrenal glands, or pituitary glands.
by Cook Children's Health Care System, Fort Worth, Texas