Other forms: procreating; procreated; procreates
To procreate is to reproduce. In other words, to procreate is a more formal way of saying "making babies."
Notice the word create in procreate? That's a clue that this word is about making something, in this case, making more creatures. In biology, procreation is typically called reproduction. All forms of procreating result in more critters like the originals. Your parents procreated, or you wouldn't be here.