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https://www.invitra.com/en/wp-content/uploads/2015/02/prostate-dysfunction-infection-sperm-concentration.png24001020After ejaculation, semen is thick and has a viscous, sticky, gel-like consistency. The density of the sperm makes it easier for the sperm to reach the bottom of the vagina. Subsequently, however, the sperm becomes more liquid so that the sperm can travel to the egg and fertilise it.