Originally Posted by
Somecrazyaussie
She didn't miscarry. She had the baby and was told it was stillborn. The package delivered to Norman was implied to be the baby. I don't know if the writers were planning on doing anything with that plot thread. In any case, it gave them an out and they never needed to refer to it ever again.
I think the pregnancy should remain. It would have given MJ another reason to be hesitant getting back with Peter. Then, if another writer comes along and wants to knock MJ up again, it adds another layer of drama.