X sperm and y sperm which survive longer

This is not mentioned in textbooks. It should be said that there is not much difference between the survival time of these two. If x sperm combines with female egg, it is a girl. If y sperm combines with egg, it is a boy. This is a chromosome that mainly distinguishes sex. Chromosomes mainly include x and y. Moreover, this kind of thing can only be distinguished when artificial test tubes are made. Normal natural conception cannot be distinguished.