Why is it that there are tens of millions of sperm when they are first born, but only one (or occasionally two or three) can find the right egg sister and the others have to be sacrificed? Speaking of which, it is reasonable to adopt the “fine sea tactics”. If the number is too small, even half of the way will all die. Let’s take a look at Mr. Sperm’s difficult journey. 1. Not born at all Mr. Sperm’s great-grandfather, called spermatogonium, lived in the seminiferous tubules. After a series of changes, sperm cells, the childhood of Mr. Sperm, will be born. These sperm cells will eventually develop into a batch of sperm. This process will take about 2 months. Read More …