The phrase "male sperm" refers to the reproductive cells that come from a male. It is the essential substance needed to fertilize a female egg and create a baby. Full definition
The head of a big male sperm whale can be 25 feet long and take up a third of the animal's length. (discovermagazine.com)
There is evidence that those fast swimming male sperm take a hit when they get hot. (mommyedition.com)
In fact, just this past week a new analysis was released showing that male sperm count in Western countries has decreased almost 60 % in just the past 40 years. (bodyunburdened.com)