I assume the pig was the father.
Setting aside the genetic incompatibilities (chromosome number and disparities in the matchup) how would this physical consummation actually take place? The anatomical differences alone make even the most imaginative configuration highly unlikely, if not altogether impossible.
There may, in fact, be a certain combination of genetic material between a high order of ape (not necessarily a chimpanzee) and some species of swine, but my contention is that it was done by an extraterrestrial visitor, a theory that seems to prevail at the studios of the creators of South Park.