[Fructose concentration in sperm liquid and its correspondence with sperm motility: vertical progression of the spermatozoons and the Botella-Casares index]. / La concentracion de fructosa en el liquido seminal y su relacion con la motilidad espermatica: la progresion vertical de los espermios y el indice de Botella-Casares

PIP: Biochemical studies of seminal liquid have detected the presence of several substances, among which fructose is the energetic factor determining sperm motility. The seminal liquid of 133 men was examined to determine level of fructose and vertical progression of glucose. Results from the tests seem to indicate that a good quality sperm contains a high amount of fructose, and that movable spermatozoa tend to quickly attack glucose reserves in the seminal liquid. It seems also that sperm transportation uses glucose and not fructose to go through the cervical canal, making glucose the physiological sperm propeller along the female genital tract. These data indicate that fructose has indirect value only on male fertility.^ieng