Semen is composed of spermatozoa suspended in seminal fluid (plasma). The function of the seminal fluid is to provide nutrition and volume for conveying the spermatozoa to the endocervical mucus. Male infertility can be affected by a number of causes. Chief among these is a decrease in the number of viable sperm. Other causes include sperm with abnormal morphology and abnormalities of the seminal fluid. Appearance: normal Volume: > or =1.5 mL pH: > or =7.2 Motile/mL: > or =6.0 x 10(6) Sperm/mL: > or =15.0 x 10(6) Motility: > or =40% Grade: > or =2.5 Motile/ejaculate: > or =9.0 x 10(6) Viscosity: > or =3.0 Agglutination: > or =3.0 Supravital: > or =58% live Fructose: positive