Okay, Sarasi1, I'll spell it out.  Say, the improbably impossible happened that a priest rendered a lady "with child".  Theologically, the conceived child would not be a priest, because the "ontological otherness" of priestliness ends with his ontologically necessary "whatever". God made it this way, just in case "the conceived might be a female. Got it? Wouldn't that be awful?!
This might seem to contradict the ability of a priest to "transmit" a priestly blessing that somehow goes from him to whomever. We'll deal with that when we have forgotten about this.