Information about a laboratory test
Low LH may occur with pituitary or hypothalamic suppression; in females, cycle phase changes the expected level substantially.
Measures LH, a pituitary hormone involved in ovulation, testicular function, and sexual development.
Used with FSH and other hormones for infertility, menstrual disorders, ovulation assessment, and early or delayed puberty.
Low LH may occur with pituitary or hypothalamic suppression; in females, cycle phase changes the expected level substantially.
LH normally surges around ovulation and may be higher after menopause; elevation outside those contexts is interpreted with other hormones.
Use the reference interval printed on your own laboratory report first. Hormone results may vary with the assay, age, sex, pregnancy, menstrual-cycle phase, and sampling time.
>= 1.8 – <= 8.6 IU/L
Example reference interval
This is an example interval from the cited source. Menstrual-cycle phase, menopause, and pregnancy can materially affect reproductive-hormone results.
>= 5 – <= 25 IU/L
Example reference interval
This is an example interval from the cited source. Menstrual-cycle phase, menopause, and pregnancy can materially affect reproductive-hormone results.
>= 7.7 – <= 58.5 IU/L
Example reference interval
This is an example interval from the cited source. Menstrual-cycle phase, menopause, and pregnancy can materially affect reproductive-hormone results.
Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.
LH is commonly interpreted with FSH. In females, comparing serial results without recording cycle timing can be misleading.
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