FSH
follicle-stimulating hormone

FSH signals your body to release an egg every month.

FSH levels will peak around the third or fourth day of menstruation.

FSH levels are normally low during childhood and, in females, high after menopause.

This blood test determines the level of FSH on cycle day 3.

And the most common test measures FSH along with one form of estrogen.

However, until recently, it was not possible to produce pure FSH.

A second hormone takes over where FSH leaves off.

It is thought that FSH may have an important role in brain development and differentiation.

This is presumed to be in response to elevated FSH levels.

In addition, with no estrogen to suppress it, FSH levels again start to rise.

FSH is important in the development of follicles (eggs) produced by the ovaries.

Each type of cell behaves differently in response to FSH.

If high FSH levels occur during the reproductive years, it is abnormal.

The amount of FSH in men normally remains constant.

A woman's FSH level can be tested using a blood sample:

An elevated FSH is a sign of low ovarian reserve.

Here, learn what high FSH levels really mean and how this affects your ability to become pregnant.

Common hormonal test include determination of FSH and testosterone levels.

So, then does FSH testing meet that need?

However, if the FSH level is extremely elevated these conclusions are likely not applicable.

Its activation is necessary for the hormonal functioning of FSH.

Two FSH measurements with one-month interval have been a common practice.

It tests the level of FSH (follicle-stimulating hormone) in the urine.