Factors that effect the success of ınduction of labor in pregnancies who have low bishop scores and undergoing labor ınduction because of postdate pregnancy

Aim: We aim to find the factors that effect the success of induction of labor in pregnancies who have low bishop scores, undergoing labor induction and having the 41st week and longer gestation. Material and Method: 77 pregnant having low bishop scores, hospitalized between June 2012 and April 2013 for the diagnosis of postdate pregnancy, were studied prospectively. Patients' gestational week, gravida, parity, abortion, body mass index, educational status, smoking status, hemoglobin levels, the initial bishop scores, if need of support of oxytocin, the presence of tachysystole, birth type occurs, the 1st and 5th minute Apgar scores of the newborn, birth weight of the newborn, if need for intensive care of the newborn were recorded. Responding to induction of labor, women with cesarean delivery and those delivered vaginally was compared. The p-value was taken as <0.05 for the level of statistical significance among the results. Findings: The pregnancy of 51 of these women was by vaginal delivery and the pregnancy of 26 was by caesarean. The average BMI of women who gave birth by Cesarean section was 28.0 ±3.3, the average BMI of women who gave birth by vaginal delivery were 30.1±4.4 (p<0.039). The average parity of women who gave birth by vaginal delivery was 1.2±1.4, the average of women who gave birth by caesarean were 0.27±0.87 (p<0.0001). The average time between the beginning of induction and vaginal delivery 13.4±7.4 hours, while the average time for women who gave birth by caesarean section was found 19.3±9.7 hours (p<0.006). 5 (100%) of women who had tachysystole gave birth by caesarean section, while none of women delivered vaginally had tachysystole (p<0.003). The newborn that was delivered vaginally had higher first and fifth minute Apgar scores. Between the group of women with cesarean delivery and those delivered vaginally, first and fifth minute Apgar score was found statistically different (p<0.005). 4 (7.8%) of women who gave birth by vaginally and 7 (26,9%) of women who gave birth by cesarean section needed for neonatal intensive care (p=0.037). Result: Parity, BMI, time the beginning of induction of labor to delivery and tachysystole were found as the factors effect the birth type occur. Parity and tachysystole were found to have significance to determine the type of birth.