Patients will be screened in the antenatal clinic at Women's Hospital, Health Sciences Centre (HSC), Winnipeg during one of their regularly scheduled visits. If patients are scheduled at another antenatal clinic in the city, we will ask the obstetrician to briefly mention the study to potential study patients, and if they are interested give them the consent form to take home and read. We will then phone patients, obtain verbal consent and discuss any questions they may have. On the morning of their procedure we will obtain written consent, and answer any additional questions they may have. Alternatively, patients will be approached by their obstetrician in clinic, and if interested will be given the option to go to the Pre-Anesthesia Clinic at HSC where a member of our study team will discuss the study with them and obtain written consent.