This blood test measures a hormone called follicle stimulating hormone (FSH). This hormone is made by the pituitary gland in your child’s brain. It helps control a girl’s menstrual cycle. It also controls the growth of eggs in the ovaries. In males, FSH helps control the production of sperm.
The FSH test may help diagnose and check treatment of a medical problem your child is having, such as:
Having this test will take just a few minutes. A small amount of blood is taken from a vein in your child’s arm with a needle. The blood is collected in tubes and sent to a lab.
Ask your child’s healthcare provider when and how you will get the result of your child’s test.
Normal FSH levels may be different based on a person's age and gender.
The FSH level may be higher than normal in girls who:
Also, the FSH levels are higher than normal in girls who have started puberty at a very young age.
The FSH level may be lower than normal in girls who:
The FSH level may be higher than normal in boys who:
Also, the FSH levels are higher than normal in boys who have started puberty at a very young age.
The FSH level may be lower than normal in boys who:
There are many other reasons why FSH test results may be outside the normal range. Sometimes the results vary with recent activity or diet. At other times the way the sample is collected or stored can affect the results.
Other hormone tests may be done with the FSH test. The results of the different tests need to be interpreted together to make a diagnosis.
Test results are only one part of a larger picture that takes into account your child’s medical history, physical exam, and current health. Sometimes a test needs to be repeated to check the first result. Talk to your child’s healthcare provider about the results and ask questions, such as: