Whether lubricant affects fertilization is mainly related to the composition of the lubricant. Under normal circumstances, lubricants are water-soluble solvents, the main components of which are pure water, fiber and propylene glycol, etc. These substances are not irritating to the human body and do not lead to a decrease in sperm quality and have no effect on human fertilization, while they can also reduce friction during sex and have a slight inhibitory effect on bacteria. If the application of poor quality lubricants containing substances such as petroleum jelly and silicone oil will not only lead to a decrease in the quality of sperm, but will also make cleaning difficult and increase the chances of the human body suffering from genital infections, so the application of poor quality lubricants will affect human fertilization and can cause a decrease in the chances of fertilization. Couples must choose the products of regular manufacturers when applying lubricants, and at the same time clean them in time after applying them.