Inclusion Criteria:  Pregnant women from 6 0/7 to 13 6/7 weeks gestation 18-50 years old Systolic blood pressure of 130-139 mmHg or Diastolic blood pressure of 80-89 mmHg  Exclusion Criteria:  History of preeclampsia Multifetal gestation Chronic hypertension Pre-gestational diabetes Renal disease Autoimmune disease Aspirin allergy or hypersensitivity Presence of nasal polyps History of aspirin-induced bronchospasm