The Use of Thromboelastometry (ROTEM) to Evaluate the Changes in Coagulation With Two Different Doses of Oxytocin Following Cesarean Delivery

Inclusion Criteria: * English speaking * Age \> or = 18 yrs * Non-laboring women * cesarean delivery under spinal anesthesia with pfannenstiel incision * ASA I-III Exclusion Criteria: * Height \<5'0" * Allergy to phenylephrine * Severe cardiac disease in pregnancy with marked functional limitations * Women receiving NSAIDS, aspirin or other anticoagulants * Subject enrollment in another study involving a study medication within 30 days of cesarean delivery * Other physical or psychiatric condition which may impair the ability to cooperate with study data collection