In the medical ritual tax for the prenatal genetics, the pregnancy experience is surrounded of signals and symbols that can produce different threats: the fear to lose the son, of whom the son is born with a defect, not to obtain to have a son or, still, not to obtain to be mother for this son, in case that it in comes to be born with defect (MARINE, 2006, p.6). When during the period of after-childbirth, the mother has confirmed the diagnosis of some deficiency in the son, fears that appear are innumerable and more intense. It remains to notice that ahead of this constellation of feelings of fear and unreliability that occur in the pregnancy, it can be imagined mainly as woman is difficult to have confirmed it the fear of the malformation, if this will be caused by some illness acquired before the pregnancy or during this. The corporal modifications in the gestation are so intense that they can easily originate the feeling of that has something made a mistake with its body, as if the woman felt that its body is not more its proper house. This estranhamento with the proper body propitiates the appearance of the fear of the malformation, that, when associated to them you blame and punishment fear, still more favors the fear of that the child is born imperfect. In an inexperienced woman young e, the fears and unreliabilities are still bigger, visa to be a new situation, that will transform its life total. The adverse impact of the precocious pregnancy emerges of clearer form when the relation between education, poverty and precocious maternity is examined. .