The investigators will be comparing sequential compression devices (SCDs) to foot pumps to determine if foot pumps will be better tolerated by obstetric patients, both antepartum and intrapartum. Patients in whom thromboembolic prophylaxis is deemed necessary and ordered by the treating physician, who agree to participate in the study will be randomly assigned to receive SCDs or the foot pump as part of their thromboembolic prophylaxis regimen. The investigators will administer a questionnaire to assess patients' satisfaction and comfort with each device and they will be asked to complete a log of hours they wore their assigned device for a 7 day period (or as long as they are prescribed). Random spot checks to verify compliance will be performed.