TOPLINE:

Those who titrated their own insulin experienced more rapid glycemic control and lower risks for macrosomia than when clinicians led titration. Both approaches resulted in similar mean fasting glucose levels before delivery.

METHODOLOGY:

• Researchers conducted a randomized controlled trial of data from 56 adults with gestational diabetes (median age, 33.8 years; mean fasting glucose level, 105.9 mg/dL) who required insulin between 20 and 31 weeks and 6 days of gestation receiving care at a tertiary care academic medical center in the United States over a 2-year period starting in October 2023.
• Participants were randomly assigned to either patient-led insulin titration (n = 29), starting at 10 units nightly, or clinician-led insulin titration (n = 27), with starting doses and adjustments made at the clinician’s discretion; 16.1% of individuals were already on metformin.
• In the patient-led group, participants decreased their insulin dose by 2 units if fasting glucose levels were below 70 mg/dL, increased their insulin dose by 2 units if levels were above 95 mg/dL, and maintained the same dose if levels were between the two levels; in the clinician-led group, participants received clinician-directed guidance through weekly reviews.
• The primary outcome was the mean fasting glucose level at 36 weeks of gestation or during the week before delivery for preterm delivery.
• Researchers also assessed glycemic measures such as macrosomia, large-for-gestational-age birth weight, and patient-reported outcomes.

TAKEAWAY:

• Patient-led insulin titration resulted in similar mean fasting glucose levels before delivery to clinician-led titration (88.8 mg/dL vs 90.3 mg/dL).
• Patient-led titration resulted in fasting glucose levels below 95 mg/dL more rapidly than clinician-led titration (mean, 1.8 vs 2.5 weeks; hazard ratio, 1.48; 95% CI, 1.16-1.90).
• Patient- vs clinician-led titration was associated with lower risks for macrosomia (relative risk [RR], 0.18; 95% CI, 0.04-0.84) and large-for-gestational-age birth weight (RR, 0.10; 95% CI, 0.08-0.12).
• Achievement of secondary glycemic targets, including postprandial and fasting glucose levels, was similar in the patient- and clinician-led insulin titration groups. Patient-reported outcomes, such as treatment satisfaction and diabetes distress, were also comparable.

IN PRACTICE:

“[P]atient-led self-insulin titration for GDM [gestational diabetes mellitus]…was associated with more rapid achievement of glycemic control and a significantly lower risk of macrosomia and LGA [large-for-gestational-age] birth weight,” the authors concluded.

SOURCE:

The study was led by Xiao-Yu Wang, MD, in the Department of Obstetrics and Gynecology at the Northwestern University in Chicago. It was published online on February 19, 2026, in Obstetrics & Gynecology.

LIMITATIONS:

The sample size was developed to detect differences in glycemia rather than clinical outcomes. The study included individuals of higher socioeconomic status and was conducted at a single center.

DISCLOSURES:

The corresponding author received support from the Care Innovation and Community Improvement Program at The Ohio State University. The authors did not report any conflicts of interest.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.