The physician orders a post vasectomy semen analysis or a spot analysis to ensure that the vasectomy procedure was successful and that no sperm are present. Men planning to have a vasectomy may also want to consider long-term semen storage before the procedure to preserve their parenting options. There are a number of glycoproteins found on the zona of the ovum, which play a role in the binding of human sperm to a human egg. Data shows that normal MBA levels correlate with oocyte fertilization in vitro. By pooling more than one specimen, low levels of binding can be enhanced.
Normal levels indicate a good candidate for cryopreservation.
The presence of a large proportion of viable but immotile cells may be indicative of structural defects in the flagellum not detectable by any other methods. Vitality results in the normal range would indicate the client is a good candidate for cryopreservation. Fructose Assay Fructose is the major energy source for ejaculated spermatozoa. Low fructose levels may also indicate an associated dysgenesis of the seminal vesicles. The assessment of fructose is also useful in the rare cases of ejaculatory duct obstruction.