Luteinizing Hormone is a hormone made in the pituitary gland. LH is one of the main sex hormones associated with both males and females and can trigger and promote ovulation in females and testosterone production in males.
In females, LH signals the ovaries to release eggs during ovulation. In males, LH helps make testosterone in the testes, supporting the production of sperm cells.
Too much or too little LH in the body are linked to disorders or tumors in the pituitary gland (prolactinomas) and also infertility in both sexes. Symptoms of this may include impotence or low sex drive in males and lactation in females who are not pregnant. Note that LH will typically vary pre and post menopause in females.