Does drinking coffee kill sperm

A little bit of coffee actually speeds up sperm. However, too much coffee, about the amount of an average of three cups a day, can cause DNA damage that will lead to birth defects. It won't kill the sperm it will mutate it, often rearranging the chromosomes that will lead to the embryo dying. It's best to keep coffee intake low. You don't have to elminate it, afterall coffee has its health benefits as well, including increased prostate health.