Luteinizing Hormone(lh)

This blood-based evaluation measures the level of luteinizing hormone, a key regulator of reproductive function. In women, it triggers ovulation and helps maintain the menstrual cycle. In men, it stimulates the production of testosterone, which supports sperm formation. Because this hormone works in close balance with others such as follicle-stimulating hormone, monitoring it helps assess fertility, reproductive health, and pituitary gland function.

Why consider Luteinizing Hormone, Serum test?

Abnormal levels may point to ovulation problems, infertility, or pituitary gland disorders. In women, high levels outside of mid-cycle can indicate conditions like polycystic ovary syndrome or premature ovarian failure. Low levels may suggest hypothalamic or pituitary dysfunction. In men, reduced values can cause low testosterone production, infertility, and decreased libido. Doctors often use this assessment to evaluate delayed puberty in adolescents as well.

Who should get Luteinizing Hormone, Serum test done?

This investigation may be suggested for:

• Women with irregular or absent periods

• Couples facing infertility issues

• Men with low testosterone symptoms or sperm abnormalities

• Adolescents with delayed or early puberty

• Patients being evaluated for suspected pituitary disorders

More information about Luteinizing Hormone, Serum test

Results vary depending on age, gender, and the phase of the menstrual cycle. In women, levels rise sharply during mid-cycle, triggering ovulation. Measuring this surge is useful in fertility tracking and treatment. For men, stable levels are necessary for normal reproductive health. Interpretation must be made alongside related hormones like follicle-stimulating hormone and estradiol. Abnormalities often require further evaluation or imaging studies.