If you have wondered how ovulation occurs, here is a interesting video that actually lets you watch ovulation take place!
 
It was taken by a doctor during a routine hysterectomy.  Not only is it amazing that it was caputured on video, but it also shows us that ovulation does not happen instantaneously.  In this case, ovulation took 15 minutes!!!
 
Check it out!
http://www.fertilityhelper.net/human_ovulation_caught_on_tape.html