Continuous Glucose Monitoring in Women With Type 1 Diabetes in Pregnancy Trial (CONCEPTT)

This is an interventional treatment trial for Type 1 Diabetics Who Are Pregnant or Planning Pregnancy focused on measuring Diabetes, Type 1, CGM, Continuous Glucose Monitor, HGM, HbA1c Read More

Inclusion Criteria:

• Clinical diagnosis of type 1 diabetes and using daily insulin therapy for at least one year
• Age 18-40 years
• Insulin regimen involves either the use of an insulin pump or multiple daily injections of insulin (at least 3 shots per day). Subjects using premixed fixed doses of insulin at the time of enrolment will not be eligible. Insulin regimen must be stable for at least 4 weeks (i.e. on multiple insulin injections or on insulin pump) prior to randomization.
• No expectation that subject will be moving out of the area of the clinical center during the next year, unless the move will be to an area served by another study center
• Informed Consent Form signed by the subject

In addition, specific eligibility criteria apply to the respective groups:

Pre-pregnancy Group:

• Patients who are planning pregnancy and wish to optimise glycemic control before conception

Pregnancy Group:

• Pregnancy gestation ≤13 weeks, 6 days at time of randomization
• Live singleton fetus
• Dating ultrasound (US) done to confirm gestational age, viability and rule out multiples. Gestational age will be based on the last menstrual period (LMP) provided there is a ≤5 day discrepancy with US dates in the first trimester and ≤10 day discrepancy with US dates in the second trimester. If the dates from LMP are outside these limits, the US dates will be used as the best estimate of gestational age.

Exclusion Criteria:

• Type 2 diabetes
• Gestational diabetes
• Previous participation in the study
• Estimated GFR <60 ml/min/1.73
• The presence of a significant medical disorder or use of a medication such as oral glucocorticoids that in the judgment of the investigator will affect the wearing of the sensors or the completion of any aspect of the protocol.

If the investigator is uncertain whether the patient would be eligible; i.e. if the medical disorder would constitute an exclusion, the Steering Committee will be asked to make the decision.

• Inpatient psychiatric treatment in the past 6 months
• Subjects using premixed fixed doses of insulin at the time of enrolment

In addition, specific exclusion criteria apply to the respective groups:

Pre-pregnancy Group:

• HbA1c <7.0% or >10.0%

Pregnancy Group:

• HbA1c <6.5% or >10.0%
• Known current higher order pregnancies (twins, triplets, etc.) These women will be excluded as they have a higher rate of adverse outcomes and could lead to inequalities if they are unequally distributed between the groups.
• Known potentially major fetal anomaly (as per EUROCAT criteria).