Luteinising Hormone (LH) is produced by the pituitary gland and is important for male and female fertility. In women it governs the menstrual cycle, peaking before ovulation. In men it stimulates the production of testosterone.
What might a low result mean?
Low levels of LH can be seen in secondary ovarian failure (in women)/secondary testicular failure (in men), indicating disorders of the pituitary gland or hypothalamus.
What might a high result mean?
Raised LH in women can signal that you are not ovulating or that your hormones are not in balance (as with polycystic ovaries).
Raised LH in men can signal that the testes are not producing enough testosterone.