Calculating percent normal sperm morphology

Reference limits One paradigm shift relates to the introduction of reference limits and thus eliminates the arbitrary cutoff values for various variables. Doctors also thought that low sperm morphology scores also caused a decrease in overall semen quality and an increase in sperm damage. Boot Camp Intro. Number of spermatozoa per day million. The article by Morgentaler et al. Male fertility potential in terms of semen quality: a review of the past, a study of the present.