Semen fructose is a sugar produced by the seminal vesicles and is an important energy source for sperm. Measuring fructose levels in semen helps assess the function of the seminal vesicles and can provide information about male fertility.
Low or absent semen fructose may indicate blockage or absence of the seminal vesicles or ejaculatory ducts, or certain hormonal or structural abnormalities. Normal levels suggest that the seminal vesicles are producing adequate fluid to support sperm motility.