To get good quality sperm, one must abstain from ejaculation for about 2 to 4 days before providing the semen sample. The semen can be collected at home or in a clinic and is stored in a sterile sample cup. In cases of home collection, the semen must reach the lab within an hour of ejaculation. Once at the lab, the semen is safely kept at a dark temperature-controlled place. The sperms are separated from the semen by the process of sperm washing. Sperm washing is a technique where chemicals that may cause an adverse reaction in the uterus are removed from the semen. Sperm processing takes about 30 to 90 minutes. The best quality sperms are used for insemination. In certain cases such as logistic concerns, oligospermia, or ejaculatory dysfunctions, the best quality sperms are separated, frozen and stored in the laboratory for later use. The cryopreserved sperm is melted 2–3 hours before the process of insemination in the clinic.