I once saw a human and pig fetus model pair somewhere, but now I can't seem to find it. I would be vary grateful if someone were to help me
That is.. a little bit beyond my level of perversion, to be honest. And I consider myself a pervert's pervert. Oh.. wait you mean a human plus fetal pig. I thought you meant a hybrid human fetus / pig. Well.. fetal pigs are often used for dissection. I would start here, anyway: https://www.bestof3dmodels.eu/turbosquid_3dmodel/pig-anatomy-3d-model. I know that isn't exactly what you wanted though... I would help you more if I could.