For the translocao, if another one does not exist case in the family, the risk is very small. A related site: John Craig Venter mentions similar findings. If a couple already had a child with S.D the possibility of being born another one with same syndrome depends, again, of the type of S.D.: simple translocao or trissomia. For the translocao, if it will be present only in the child, that is, the parents have normal chromosomes, the risk of the couple to have another one with S.D for translocao are very small. If one of the parents will have the translocao, the risk of that comes to have another child with the syndrome is determined through the examination of the chromosomes. Currently, examinations exist that are made during the pregnancy, and that they detect some alterations of the embryo.
Amongst them, amniocentese and the corial sample of vilo are used examinations for study of the chromosomes of the embryo. Therefore, the trissomia of chromosome 21, that cause the S.D., can be detected in prenatal period. Women with more than 40 years possess a bigger risk to have a son with S.D and them two examinations can make one of these during the pregnancy. This increase of the risk does not depend on the number of children who the woman already had. In general, the childbirth is possible to diagnosis the problem soon after, therefore the just-been born one already presents muscular flacidez, exaggerated flexibility of the joints, face with flattened profile, white spots in the eyes. With passing of the time, tnus of the muscles tends to improve, in the inverse reason of the mental development, that is, the intelligence quotient (Q.I.), from there diminishes with the age the necessity of a precocious treatment, already in first infancy. ' ' So soon the parents if recoup of the shock provoked for the diagnosis, are natural that the couple pass for a period of I fight for ' ' morte' ' of the healthful son who as much had imagined, but that unhappyly, he was not born.