Table 4

Guidance on targets for assessment of glycemic control during pregnancy

Diabetes groupTIRTBRTAR
% of readings; time per dayTarget range% of readings; time per dayBelow target level% of readings; time per dayAbove target level
Pregnancy, type 1§>70%; >16 h, 48 min63–140 mg/dL (3.5–7.8 mmol/L)<4%; <1 h<63 mg/dL (<3.5 mmol/L)<25%; <6 h>140 mg/dL (>7.8 mmol/L)
<1%; <15 min<54 mg/dL (<3.0 mmol/L)
Pregnancy, type 2/GDM§See pregnancy section63–140 mg/dL (3.5–7.8 mmol/L)See pregnancy section<63 mg/dL (<3.5 mmol/L)See pregnancy section>140 mg/dL (>7.8 mmol/L)
<54 mg/dL (<3.0 mmol/L)
  • Each incremental 5% increase in TIR is associated with clinically significant benefits for pregnancy in women with type 1 diabetes (59,60).

  • †Glucose levels are physiologically lower during pregnancy.

  • §Percentages of TIR are based on limited evidence. More research is needed.