Thrombocytopenia (platelet count < 100,000/mL) occurs in approximately 15% of women with preeclampsia. Neuraxial analgesia is contraindicated in parturients with a coagulopathy; therefore, the platelet count is routinely checked prior to the initiation of neuraxial analgesia in women with preeclampsia/eclampsia. Catheter removal is also contraindicated in the presence of a coagulopathy. Some women have an acceptable platelet count at the initiation of neuraxial analgesia, but may become significantly more thrombocytopenic during labor and delivery. In a study of severely preeclamptic parturients, some with HELLP syndrome, the admission platelet count correlated with the platelet count nadir. However, the natural progression of the platelet count has not been studied in women with mild preeclampsia, or in severely preeclamptic parturients without HELLP syndrome. We hypothesize that women with mild preeclampsia or severe preeclampsia without HELLP syndrome (as defined by the American College of Obstetricians and Gynecologist criteria), and whose admission platelet count is greater than 150,000/mL, will have a stable platelet count during the course of labor and delivery and do not require another platelet count check prior to initiation of neuraxial analgesia or removal of the epidural catheter. The purpose of this study is to determine at what value the negative predictive value of the initial platelet count is less than 100% for the development of thrombocytopenia or other coagulopathy during labor.