What is an FSH test?
An FSH test usually consists of a simple blood test. A small sample of blood is needed, and the risks are minimal. A person can generally return to their everyday activities afterward. A doctor will not use the FSH test alone to determine if a person is going through menopause or identify reasons for infertility.
What factors affect FSH levels?
During the reproductive years, levels are typically 4.7–21.5 IU/L. Hormonal disruption and other factors can lead to high or low levels. However, many factors can affect FSH levels, including a person’s weight and various health issues. Follicle-stimulating hormone (FSH) plays an integral role in reproductive processes.
What is a normal FSH level?
In general, normal FSH levels for men or people AMAB include: Before puberty: 0 to 5.0 milli-international units per milliliter (mIU/mL). During puberty: 0.3 to 10.0 mIU/mL. Adult: 1.5 to 12.4 mIU/mL. In general, normal FSH levels for women or people AFAB include: Before puberty: 0 to 4.0 mIU/mL. During puberty: 0.3 to 10.0 mIU/mL.
What causes low FSH levels in children?
FSH levels are normally low in children. As puberty approaches (usually between ages 10 and 14), the hypothalamus produces gonadotropin-releasing hormone (GnRH), which triggers FSH and LH. This begins the changes toward sexual maturity and development.
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