Introduction: The episiotomia as an obstetric procedure had it first roots at the start of the 18th century, when Stephen mentions how Old made for the first time the episiotomia for extremely difficult delivery. Since 1920 until today its used as a routine procedure of routine in primigestantes.
Goals: Comparing the presence of some obstetric complications in nuliparas women after practicing either or not the episiotomia mediolateral.
Methodology: The work was donde in the Carlos Holmes Trujillo hospital, that covers the attention of low risk deliveries it south eastern part of the city. An experimental design was made in the one that were selected two different groups of gestantes. The muestra was conformed by 34 patients for the group control (who received the rutinary management of making episiotomia) and 30 patients for the experimental group (the ones that didn't received the routine episiotomia).
Results and discussion: The harm perception was a much more intense in thr control group with significatively different status; the pain was qualify form modered to severe. In none of the groups were presented desgarros (grade III and IV) circumstances that can be related with the homogeneity that presented the groups according to the different variables associated with this factor, no matter what were some of them presented desgarros in grade I and II in the experimental group occurred in its mayority in the deliveries attended by the less experimented people. The harm associated with episiotomy valued in ten days post delivery were more in the control group against the experimental group, especially difficult to sit downand fear the restart sexual activity, finding frequencies until four timesigher in the control group, circumstances that can affect the process of cicatrisation in the partner relation. This findings are related with the surgical incision and the disagreement things produced in the puerperium. When evaluating the presence of dispareunia in both groups at the sixty days postpartum it was observed: In the control group some soft harms as pain and bleeding with the start of sexual activity (15 post delivery). The strength of the present study is based precisely in relatives aspects to the selective episiotomy.
Conclusions: It exists a group of patients that were beneficiated in an important way from the episiotomy, reason why it could not be abolished completely in this procedure; but the literature in the present study coincides in suggest that used in a selected way with much more cleared and specifics concepts (imminence of laceration or compromise of fetal vitality) produce more benefits to the women.

Keywords
Routine of episiotomy. Inmimence of perineal damage. Elective of episiotomy. Perineum pain. Disparheunia.