Sperms vs Egg description

It is the year 2999 and humans are close to extinction. Despite their best efforts, mankind has been unable to produce children for many years. Many theories have been tested, but none have been successful. Hope grows dim. Slowly but surely the women have grown older, eventually reaching menopause, unable to give birth. When suddenly, a special egg was found, able to fertilize more than once. This is our chance!!! She needs your help! Fertilize as many good eggs as you can while avoiding the bad viruses. With your help we can repopulate the earth!