Normal values of follicle stimulating hormone (FSH) vary during different periods, such as the follicular, ovulatory, luteal, and menopausal phases, with values ranging from 1.37 U/L to 100.6 U/L. Normal values may fluctuate depending on how different laboratories perform the test.
1. Follicular phase: This is the period when the follicles are developing to maturity, and the normal values of FSH range from 1.37 to 9.9 U/L.
2. Ovulation: FSH values peak during ovulation, promoting follicular discharge. Normal values range from 6.17 to 17.2 U/L.
3. Luteal phase: the period after ovulation, the FSH value will appear a certain decline, the normal value is generally between 1.09 ~ 9.2 U/L.
4. Menopause: When women are in menopause, due to the decline of ovarian function, FSH will be reflexively elevated, and the normal value is generally between 19.3 and 100.6. Normally, FSH > 40 U/L suggests ovarian decline.
A high FSH value suggests ovarian dysfunction or ovarian hyperstimulation syndrome; a low value suggests hypothalamic dysfunction. Different hospitals, different laboratories, and different testing methods are used, and the normal values may fluctuate. It is advisable to consult a medical professional for details.