Several techniques have been described to evaluate sperm
morphology. Sperm are classified into normal-oval shaped, tapered, amorphous, duplicated and immature. Normal spermatozoid must have an oval form with smooth contour, acrosomal cap encompassing 40-70% of head, no abnormalities of midpiece, or tail and no cytoplasmic vacuoles of more than half of the sperm head. Head size is 5-6m M x 2.5-3.5m M.