The congenital absence of the vagina has a low incidency but it is a very invalidating condition. The Mayer-Rokitansky-Küster-Hauser syndrome represents 90% of all cases of vaginal aplasia. The authors review the anatomical classification, etiopathogenesis, epidemiology, diagnosis and treatment. Between 1981 and 1991, four cases were treated by recto-vesical dissection and split thickness skin graft technique with adjustable stent. The results are good and correspond to those of the literature. Their quality and duration depend on maintaining the stent for a sufficient length of time. Frequent post-operative follow-up is necessary to prevent graft retraction and to give psychological support when it is needed.