Answer- D. Spermatocyte morphologyEvaluation and assessment of semen is very impoant for both diagnosis of male infeility and selection of patienti for treatment with IVF or ICSI. It has been shown that sperm morphologt assessed strictly is most strongly related to feilization rafe than other parometers. In the WHO guidelines for Normal semen analysis, Sperm morphology, ie. > 4% normal forms is the only strict criteria for sperm adequacy.