Tag Archives: sperm facts

(Sperm) Size Matters

Size may not matter in the human world, but when it comes to other animals and insects, giant sperm is the way to go, especially if the creature has a tiny body. A mussel-like animal that lived 100 million years ago produced sperm that was longer than its body. Even today, there are animals making large sperm. A fruit fly can produce a 2.5-inch coil of sperm, even though its body is only a few milliliters. To equal the same sperm to body ratio, a human would have to produce sperm 40 meters long. Ostracodes, an extinct ancient class of arthropods, also produced long sperm. With these findings scientists have concluded that giant sperm production is a proven, evolutionary tactic for successful reproduction. Creatures can increase the chance of fertilization with a larger sperm cell. [Reuters] Keep reading »

Sperm Have To Be “Turned On” To Fertilize An Egg

A study published in the Journal of Proteome Research found that sperm can’t fertilize an egg immediately after entering the female reproductive tract. No, sperm are fickle little guys. An activation process scientists call “capacitation” has to take place in them. Basically, the cells in the sperm have to be “turned on” for them to do their deed. So, not only do you and your man have to be in the mood to make babies, but so do his male reproductive cells. Researchers are working on figuring out what gets sperm in the mood. [Medical News Today] Keep reading »

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