During ejaculation, millions of these sperm cells find their way inside the female, swimming through the semen which includes a variety of chemicals and nutrients, all intended to assist the sperm on their journey. These chemicals include the sugar fructose, which provides most of the energy to be used by the sperm. A man ejaculates about 2 to 5 cm3 of semen, with every cm3 containing about 50 to 130 million sperm. Off they are on their way to seek their prize… the egg cell and the opportunity to hand in their genetic material to the future offspring. But the story is not over yet. Along their way they have to face many perils and hazards. … and not even our science knows the full drama of this story. Relative to their size, the distance sperm cells need to navigate through is roughly equivalent to a 25 –50 kilometre journey for a human. But then only ONE winning ‘champion’ sperm cell will succeed in gaining entrance through the egg membrane. In fact, immediately after the sperm nucleus is delivered inside the egg, changes happening in the egg’s surface will ensure that no further sperm will gain entry. The genetic material carried in the sperm’s head would now have been delivered safe and sound inside the egg. The rest is another story which takes nine full months to unfold.