CGM in Gestational Diabetes Cuts C-Sections and NICU Stays

What Was Studied and Why It Matters

Gestational diabetes mellitus (GDM) — diabetes that develops during pregnancy — affects both mother and baby when blood sugar isn't managed well. Researchers wanted to know whether wearing a continuous glucose monitor (CGM) throughout pregnancy would lead to better outcomes than the standard approach of finger-stick testing four times a day.

The Steady Sugar trial followed 120 pregnant women diagnosed with GDM as early as 8 weeks into pregnancy. Two-thirds used a Dexcom G6 CGM full-time, while one-third relied on traditional finger-stick checks. All women received lifestyle and medication guidance based on their glucose data.

What the Researchers Found

Interestingly, both groups spent a similar amount of time with blood sugar in the healthy target range — so the CGM didn't dramatically change average glucose control on paper. But the real-world outcomes told a very different story:

• Unplanned C-sections: 20% in the CGM group vs. 44% in the finger-stick group — less than half the rate
• Preterm births: 6.8% vs. 18.4% — the CGM group had about one-third the risk
• Oversized babies (large-for-gestational-age): 5% vs. 18.4% — a significant reduction
• NICU admissions: 22.5% vs. 44.7% — far fewer newborns needed intensive hospital care

Women using CGM also reported high satisfaction with the device, saying it helped them understand their body's responses to food and activity and gave them greater confidence in managing their condition day to day.

Why CGM May Help Even When Average Numbers Look Similar

The researchers believe CGM helps by revealing sudden glucose spikes and dips that finger-stick tests — taken only four times daily — can easily miss. Seeing these patterns in real time allows doctors to adjust medications and allows patients to adjust meals or activity faster. It's the difference between a snapshot and a full movie of your blood sugar.

What This Means for Patients

If you've been diagnosed with gestational diabetes, asking your care team about CGM is worth a conversation. This trial suggests that wearing a CGM may meaningfully lower your chances of an emergency C-section, early delivery, and your baby needing the NICU — even if your overall average glucose looks acceptable on routine tests.

Managing the supplies that come with CGM — sensors, transmitters, and compatible testing materials — can feel overwhelming during pregnancy. MDS Diabetes offers a range of CGM supplies and diabetes management products, making it easier to stay stocked and focused on what matters most: a healthy pregnancy.

Bottom Line

Continuous glucose monitoring during pregnancy with gestational diabetes led to dramatically better outcomes for mothers and babies compared to finger-stick testing alone — fewer emergency C-sections, fewer premature births, fewer oversized newborns, and fewer NICU stays. Talk to your OB or endocrinologist about whether a CGM is right for your pregnancy care plan.