Which one survives longer, X sperm or Y sperm? The main reason is that male sperm contains X sperm and Y sperm. The sex chromosome of the fertilized egg formed by the combination of X sperm and egg is XX sex chromosome for female, and the sex chromosome of the fertilized egg formed by the combination of Y sperm and egg is XY sex chromosome for male fetus if the sperm that enters the egg is Y sperm. After a one-time ejaculation, the spermatozoa injected into the body are more than 1-3 billion, at least one hundred million, the number of Y spermatozoa is relatively dominant in number, twice as many as X spermatozoa, but Y spermatozoa survival time is relatively shorter than X spermatozoa. X spermatozoa determines the spermatozoa of the female, characterized by the spermatozoa’s head is relatively large, oval, and the tail is shorter, so it’s more bulky and heavy, so it is relatively slow in action, but it is more acid-resistant. Acid resistance is relatively strong and vitality is also relatively strong. The survival time of spermatozoa after entering the vagina is usually 24-72 hours, and X spermatozoa survive for a relatively longer time than Y spermatozoa.