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FSH (Follicle Stimulating
Hormone) is a hormone, released from the anterior pituitary gland. It
is a gonadotropin, stimulating the ovary to produce hormones and
ovulate.
FSH causes an ovarian follicle to develop and drives the pre-ovulatory
rise in estrogen.
There is spike of FSH coincidental with the LH surge. These lead to
ovulation within a few hours.
Elevations found in:
- Ovulation
- Ovarian failure
- Testicular Feminization Syndrome
Decreases found in:
- Polycystic Ovary Syndrome (PCO, Stein-Levinthal Syndrome)
- Amenorrhea-Galactorrhea Syndrome
- Pituitary failure
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Normal Values*
| Men |
4-25 mIU/ml |
|
Women |
4-30 mIU/ml |
Women
(Midcycle) |
2 x baseline |
Women
(Menopausal) |
40-250 mIU/ml |
*These are general values taken from a variety of
sources. The actual normal values may vary from lab to lab and from one
type of testing protocol to another.
FSH levels in one cycle
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Source:
Operational Medicine 2001, Health
Care in Military Settings, NAVMED P-5139, May 1, 2001, Bureau
of Medicine and Surgery, Department
of the Navy, 2300 E Street NW, Washington, D.C., 20372-5300
OB-GYN 101:
Introductory Obstetrics & Gynecology
© 2003, 2004, 2005, 2008
Brookside Associates, LLC
All rights reserved
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