Backgrond & Objectives: Oligohydramnios is a disorder which is followed by unpleasant outcomes for fetus that can lead to termination of pregnancy before term and preterm delivery. For these patients' increase in gestational period and prevention of preterm delivery is the most important act. In this study the effect of intravenous and oral hydration therapy in increasing duration of gestation in patient with oligohydramnios was evaluated.

  Methods: In this study, the population was devided into two case and control groups with 30 female individual who were found to have oligohydramnios in course of hospital admission according to on sonographic results. Patients were randomly put in case or control groups. Case group were given 3-4 liter normal salin for 1 week and then were given oral hydration solution until the end of pregnancy, In each group whenever it was found that pregnancy was not possible the pregnancy continuance was stopped. Data collection was through history, physical examination completing relevant questionnaire and findings of sonography and in order to see the relationship among finding s, kitest and t-test from SPSS software were used.

  Results: The age means of case and control groups were 25 and 24 respectively. The mean of pregnancy duration from the diagnosis time in case group was 30.2 weeks and in control group 31.8 weeks. The mean of pregnancy terminatior in case group was 34.6 weeks and in control group 34.2. In increasing duration of pregnancy in case and control group. It was concluded that intravenous and oral Hydration therapy cause incerease in duration of pregnancy in patients suffering from oligo Hydraminos. According to the results of this study and significance of the difference.