No virus was in or attached to the sperm cells.

Let's say that a man has perfectly healthy sperm cells.

Of this, around 1% by volume only is sperm cells.

Perhaps she originated with the help of a male sperm cell.

And then there is the strange idea of growing human sperm cells in another species.

In all, five hundred million swimming sperm cells came, enough for every available egg.

They can make sperm cells that are released into the water.

Inside, they contain the largest sperm cells of any living creature.

With the Lewinsky dress, the first task would be to look for sperm cells.

The genes stuck naturally to the outside of the sperm cells.