At the Ottawa Hospital 168 and 149 women who delivered and had GDM in 1997 and 2000 respectively. Averaging over the two years, we would estimate that approximately 160 women per year delivered at the Ottawa Hospital with GDM. Also, at the General campus of the Ottawa Hospital, approximately 30 patients per year are followed for GDM at the HRU but deliver at the Montfort hospital. Therefore, we would estimate that there would be a potential study population of 190 women at the Ottawa Hospital per year. We would also assume that 10% of women would decline to participate in the study, further reducing the potential population to 171 women. Therefore we would anticipate the study would take almost two years to complete enrollment.