Male reproductive system includes internal and external genitalia. External genitalia include scrotum and penis. Each testis is an oval structure about 4.5 to 5.1cm long and 3cm in diameter and located in the scrotum. each testis contains seminiferous tubules which are long, highly coiled, and looped tubules. Sperm are produced within the seminiferous tubules. Sertoli cells which are located within seminiferous tubules feed and protect developing sperms. Epididymis is a long tube located along the superior and posterior margins of the testes. Its function is sperm transport, storage and maturation (motility and fertility maturation). Sperm transport through the human epididymis last from 2 to 12 days. Process of sperm production is called “spermatogenesis” which begins at puberty and takes approximately 64 days in the human. The conversion of spermatids into mature spermatozoa is called “Spermiogenesis”. The mature and normal sperm cell is approximately 60 mm in length and has a head, neck, middle piece and tail. The head should be oval in shape and 4 to 5 mm in length. The midpiece is slender and less than 1 mm in width.The tail should be straight, uniform and thinner than midpiece, and approximately 45 mm long. Sperm morphology classification has a predictive value in invitro sperm fertilization. The following defects has been recognize according to WHO criteria: (a) Head defects including large, small, tapered, pin, pyriform, round, amorphous, vacuolated heads and heads with small or large acrosomal area (b) Neck & Midpiece defects including bent neck, asymmetrical insertion, thick and thin midpiece and cytoplasmic droplet.(c) Tail defects including short, broken, bent, double, coiled tails and tail-tip coiling.