A parent without the knowledge of PPN is shooting in the dark. A prenatal or perinatal child is a unique human being and needs to be nurtured with care and understanding.
The first step to make this happen is for the parent to get aware of how special and powerful a prenate or an infant is. Once awareness sets in with the parent, the parent is then in a position to understand who the baby is, what is its state, how it learns, what are the means of learning, how the parents could engage with the child, what the parents need to do at every stage of development and so on.
With such a knowledge based approach the relationship between a parent and child becomes more productive, the bonding between them transcends the nature bond and progresses towards the Attachment bond which human beings can aim for.