LH Blood Test

LH – Luteinizing Hormone; Fertility Diagnosis

Luteinizing Hormone is a hormone that is released by the pituitary gland and can be measured by a simple blood test. The LH helps regulate a female’s menstrual cycle, ovulation and plays a large role in the production of sperm in males. This blood test is commonly given to women that are trying to get pregnant or have had difficulty maintaining a pregnancy in the past.

Who Should Have The Blood Test

The LH blood tests help doctors diagnose menstrual problems for females. It can also pinpoint or detail the absence of ovulation, which is crucial to achieving pregnancy. The blood test can also determine if a child has begun puberty and in some cases detail why sexual organs are not developing normally. LH levels can also provide information about a female’s response to medication given to stimulate ovulation.

Ranges & Levels

The ranges and levels of the LH blood tests range between females, males and children. Females that are midpeak in their menstrual cycle range between 6 and 17 IU/L.  Those women that are past menopause have a normal range between 19 and 100 IU/L. Men range between 1 and 15, male children at puberty normal levels are 4 to 12 and a female child at puberty age has a normal level of between 2 and 14 IU/L. Abnormally high levels in females can be a result of Anorchia, Menopause, Hypogonadism and Poly Cystic Ovaries Syndrome (PCOS). Abnormally low levels can represent Anovulatory bleeding, infertility and ovarian cysts.