Propecia?! Low sperm count/motility?

Christy
Ok so I was thinking about this and it never came across my mind till recently. I've read that taking propecia may affect speed count and/or motility. Is there anyone that has gotten pregnant while their partner was in this medication!? Or, if and when you went to a specialist did they suggest that they come off the medication? I know DH is going to oppose but then I don't think it will ever happen. Is there an alternative? Help!