You don't even have to go all the way to 22 weeks to clearly see a fetus is NOT a ball of cells. The majority of abortions are done between 8-13 weeks. The baby is clearly not a ball of cells even at that stage:
http://www.youtube.com/watch?v=zwhIx-QZkB0&feature=relatedI have never ceased to be amazed at how human and precious a life is even at the earliest stage. How you can view something like that and then still go on to kill it and justify that murder is beyond me:(