Table 1

Changes in mean glucose, HbA1c, and percentage of capillary glucose levels >8 mmol/L (144 mg/dL) during T1D pregnancy

GestationMean glucose, mmol/LHbA1c, %HbA1c, mmol/mol% Glucose >8 mmol/L (144 mg/dL)
Booking7.6 ± 1.460 ± 15
12 weeks7.8 ± 1.56.8 ± 1.051 ± 1139.9 ± 15.7
16 weeks7.4 ± 1.26.3 ± 0.945 ± 1035.2 ± 13.0
20 weeks7.3 ± 1.15.9 ± 0.841 ± 935.1 ± 13.0
24 weeks7.4 ± 1.05.8 ± 0.840 ± 935.2 ± 13.8
28 weeks7.3 ± 1.15.9 ± 0.841 ± 935.4 ± 13.3
32 weeks7.1 ± 1.05.9 ± 0.741 ± 833.8 ± 12.3
  • Data are mean ± SD.

  • ‡These data are provided courtesy of Dr. Rosemary Temple and Dr. Katharine Stanley from the Norfolk and Norwich University Hospital NHS Foundation Trust antenatal diabetes clinic. The mean gestational age at the first (booking) visit was 7.2 ± 2.2 weeks, with 80 (78%) women seen at ≤8 weeks and 90 (88%) at ≤10 weeks.