Spider-girl showed him as a decent dad, but one that was overly strict and over protective, which I thought fit the character well.
That just leaves the only option being to send the kid into the future, and if they do that, you just know he's going to come back as a cyborg with lots of guns.Both MJ and Peter would be incredibly hesitant about having kids. Purely because of the lifestyle Peter leads. If a pregnancy does happen, I could see it being a unexpected one. MJ wrestling with whether to tell Peter on not. Some great drama could come out of such a situation. But, again, once you head down that road it is a hard one to backtrack on if editorial or writers wish to ditch it later.
Nobody would want another miscarriage situation to occur again. Nor would they welcome a termination.