Giving birth can be a complicated experience that can be overwhelming, exhausting and a miracle. The birthing process has changed over the years and more and more women are giving birth by cesarean section. In 2009, 32.9% of births in the United States were performed by cesarean section (1). Once a woman has had a cesarean section, the options for the next delivery are to repeat the cesarean section or attempt a trial of labor which could result in a vaginal birth after cesarean (VBAC). There are risks and benefits associated with both options, but each should be presented to the patient in an informed manner. Many factors go into choosing a birth method that is safe for mother and baby. VBAC is successful about 70% of the time (2), but this is a very vague statistic. The chances of a successful VBAC depend on many factors that need to be considered early in the pregnancy and as labor progresses. The following studies discuss some criteria that should be considered when calculating the individual probability of successful VBAC. This information should be used to inform both the provider and the mother of the best-informed prediction about the unpredictable birth event. Flamm Admission Scoring An admission scoring system was introduced by Flamm and colleagues (1997), as part of a prospective cohort study of women who had a previous cesarean section. Researchers calculated a predictive score for VBAC success based on data collected from women upon admission to hospital via a multivariate logistic regression model. This model made it possible to identify five significant variables (table 1) at the time of work which can be calculated in a point system to determine the probability of attempt...... middle of paper ...... the different circumstances of work (grobman). The second model created by Grobman had 12 factors that could be applied during active labor (grobman), but others have called the model complicated because it is difficult to evaluate so many factors in the short time available (Eden, Metz). Research is still ongoing to find a model that providers and mothers can use effortlessly with high specificity and sensitivity. A refined preaching model for VBAC has yet to be created, but at present, current models can help clinicians and patients make a more informed decision between an elective repeat cesarean or attempting labor to achieve a AVAC. The calculated scores can give a woman more information about her birth choice and potentially give her peace of mind about the choice she is making for herself and her unborn child..