Posts tagged "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…

By: Annika Harris / June 19, 2009

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…

By: Catherine Strawn / April 14, 2009