You are presented with the quiz "Sperm had to swim from what to what reproductive organs for zygotes to occur." 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sperm had to swim from male to female reproductive organs for fertilization" and "if fertilization occurs, the fertilized eggs are now described as pre-embryos or zygotes". 

So, what's the best answer to the question?


 

  male to female         