During fetal development, identical twins with different placentas have different experiences before birth, which can leave a different mark on their later development. Thus, one identical twin may escape a mental or physical flaw that plagues the other. Cohen said that good parenting is still crucial. It's just that good outcomes are not guaranteed. We parents are still responsible for doing our best.
Children can feel pressure to conform to a parent's hopes and expectations.
They may identify with them, at least for awhile. Parenting is all about doing your best to inhibit the bad stuff and encourage the good. Just get out of the way of the really bright, mature kids. In any case, parenting is kind of a crap shoot. Most of the time you luck out with a wonderful kid, but again, there are no guarantees.