Facts About the Reproductive System

  Pheromones are airborne hormones that can cause you to be 
   attracted to some people and not others. Pheromones are the 
   cause of women cycling together when they live in close
   situations (such as dormitories).

•  Studies have shown that humans are attracted to pheromones 
   from people who are genetically dissimilar.

  Each day a healthy male produces about 300,000,000 sperm, 
   which are the reproductive cells in males.

  Each sperm cell is less than 0.04 inches in length.

  A woman’s reproductive cells, called eggs, are the largest cells in a woman’s body.

  The diameter of an egg is 50 times the size of a sperm cell.