LH FSH Ratio

An LH FSH Ratio test measures and compares the level of follicle stimulating hormone and luteinizing hormone in your blood. These hormones are vital for sexual development and reproductive health. The LH FSH Ratio helps detect and monitor hormonal imbalance, fertility issues and early or delayed puberty. 

Follicle-stimulating hormone (FSH) and luteinizing hormones (LH) are two important hormones produced by the pituitary gland that work together to control sexual development and reproductive function. In women, FSH and LH control the menstrual cycles and enhance the formation and development of eggs for ovulation. In men, FSH and LH stimulate the production of testosterone which is necessary for the production of sperm. Thus, LH plays a major role in puberty and fertility in men too.

A doctor may recommend an LH FSH Ratio when a woman is experiencing symptoms of irregular or heavy menstrual periods, polycystic ovarian syndrome (PCOS), if she is facing difficulty in getting pregnant, and/or if pituitary or hypothalamus (an important part of the brain) problems are suspected. In men, this test can be performed when fertility issues and signs of low testosterone levels, such as decreased sex drive and low muscle mass, are observed. You may also be advised to undergo an LH FSH Ratio if you experience any symptoms of pituitary disorders. 

In women, the LH FSH Ratio is advised on the second or third day of the menstrual cycle. For men, the test can be done at any time. Your doctor may ask you to temporarily stop taking certain medications, such as birth control pills. Different methodologies may yield slightly different results depending on laboratory guidelines. Talk to your doctor about your specific test results. The results will help them evaluate your medical condition; make recommendations for diet, exercise, or medication; and formulate an overall treatment plan if needed.