Read more about Prenatal Education from the works of the Mother and Sri Aurobindo.
True maternity is meant to manifest the spiritual force capable of transforming the earth’s present conditions. This new form will be constructed by women. While the new species acquires this formerly unmanifested power or consciousness, it may lose one or many of the perfections which were the characteristics of the immediately preceding species. The new race shall be governed by intuition, that is to say, direct perception of the divine law within. 
To bring children into the world as rabbits do their young—instinctively, ignorantly, machine-like, that certainly cannot be called maternity! True maternity begins with the conscious creation of a being, with the willed shaping of a soul coming to develop and utilise a new body. The true domain of women is the spiritual. 
To see that her thoughts are always beautiful and pure, her feelings always noble and fine, her material surroundings as harmonious as possible and full of a great simplicity—this is the part of education which should apply to the mother herself. And if she has in addition a conscious and definite will to form the child according to the highest ideal she can conceive, then the very best conditions will be realised so that the child can come into the world with his utmost potentialities. 
The conception should take place entirely outside of desire. That's another very difficult condition to be fulfilled. And the mother, throughout the gestation, should be in an atmosphere absolutely protected from all degrading influences: an ideally beautiful place, a wonderful climate where everything is harmonious, and a wholly spontaneous, free and harmonious and beautiful life sheltered from all vulgarities of life. And the mother herself should have the ideal of the new child. It should be done not as a mechanical but as a conscious, willed thing in an absolutely "creative" atmosphere, we might say. 
Conception by putting themselves in a state of aspiration and almost of prayer, so that the being they are going to form may be one fit to embody a soul which they can call down to incarnate in that form. They should prepare themselves through special concentration and meditation and aspiration and sought to bring down, into the body they were going to form, an exceptional being. Women who are trained to strong exercises and have a muscular body go through the ordeal of child-formation and child-birth much more easily and painlessly. 
Birth and the Psychic Being
The psychic being looks for the kind of vibrations it wants; it sees them very clearly. It is as though it was aiming at the place where it is going to drop. But it is an approximation because of the fact that another condition is necessary: not only its choice but also a receptivity from below and an aspiration. There must be someone in the environment it has chosen, generally the mother (sometimes both the parents, but the most indispensable is the mother), she must have an aspiration or a receptivity, something sufficiently passive and open or a conscious aspiration towards something higher. And that kindles for the psychic being a little light.
It needs to find someone receptive. When it sees that, it rushes down. But what happens is something like an image: it is not exactly that, but something very similar. It throws itself down into an unconsciousness, because the physical world, even human consciousness whatever it may be, is very unconscious in comparison with the psychic consciousness. So it rushes into an unconsciousness. 
It depends on the state of development of the soul which wants to reincarnate―we take the word "soul" here in the sense of the psychic being, what we call the psychic being―it depends on its state of development, on the milieu in which it is going to incarnate, on the mission it has to fulfil―that makes many different conditions. It depends very largely on the state of consciousness of the parents. For it goes without saying that there is a stupendous difference between conceiving a child deliberately, with a conscious aspiration, a call to the invisible world and a spiritual ardour, and conceiving a child by accident and without intending to have it, and sometimes even without wanting it at all. I don't say that in the latter case there cannot also be an incarnation, but it usually takes place later, not at the conception. 
If one is yogically conscious he can actually prepare the body of his next birth. Before the body is born he shapes and moulds it, so that it is he who is the true maker of it while the parents of the new child are only the adventitious, purely physical agents. 
One chooses an environment, a country, a certain type of family, one tries to see the nature of the likely parents, one asks for certain already well-developed qualities in them and a sufficient self-mastery. But all this is not enough if one does not carry in oneself a sufficient dynamism to overcome the obstacles… 
Read more about Parenting from the works of the Mother and Sri Aurobindo.