This study is a retrospective review of records which examines the possibility of two markers for the onset of active labor (contractions which result in a change in the uterine cervical dilatation) on routine clinical prenatal assessment. The markers in question are an elevation of urobilinogen on routine dipstick and slight maternal weight loss. An apparent clinical correlation between the presence of urobilinogen, maternal weight loss and onset of active labor has been observed in our patient population. Our hypothesis is that these markers in the term gravida are an indication of delivery within a week of their appearance on routine prenatal evaluation. Should a correlation exist, the clinician would have a relatively inexpensive way of identifying patients that could deliver within the week and could possibly predict those patients that would have success with induction, as the normal labor process may have begun. The purpose of this study, then, is to search existing clinic and hospital records for answers to the following two questions: (1) Do pregnant women who are at least 37 weeks gestation and who have an increase in urobilinogen on urine dipstick at a prenatal appointment have a statistically significant shorter average time before going into active labor than their negative counterparts? (2) Do pregnant women who are at least 37 weeks gestation and who show a modest weight loss between two prenatal appointments have a statistically significant shorter average time before going into active labor than their counterparts who did not lose weight? In humans, the signals that initiate labor are not completely understood. While many theories have been explored, an exact pathway has not yet been determined. Urobilinogen is formed from conversion of conjugated bilirubin in the intestine by bacteria. A fraction of the urobiliogen is then reabsorbed into the bloodstream and filtered by the kidneys, becoming a colorless component of urine. Normally, only 1-4 mg of urobilinogen is excreted in the urine per day. Hemolytic processes, hepatocellular damage, and cholestasis can elevate urobilinogen in the urine. Routine dipstick tests have a normal urobilinogen range of 0.2 to 1 mg/dl (1). In this study, we will examine the urine dipsticks for an increased change in the urobilinogen levels within the last two prenatal appointments prior to delivery.