Each specie relying on sexual reproduction is an example of “Irreducible Complexity” because the systems in the male and female bodies require their counterparts to be of a minimum design for success. The individual systems (male and female) are also examples of “Irreducible Complexity”. There is also the question of time. The incubating host (in most cases, such as human, the female) is more complex than the counterpart. A complexity of such degree that evolutionary standards should separate males and females into two species. It would take many more millions, billions (?) of years to produce a woman than a man if we had to wait for evolution. Can you imagine all those teenage boys who think marriage is a long time to wait? What if they had to wait for evolution?