Diabetic retinopathy progression during pregnancy

By trimester

Weeks 1–13

1st trimester

A baseline dilated eye exam is recommended before conception or within the first trimester for anyone with pre-existing type 1 or type 2 diabetes. Progression risk is shaped heavily by how long you've had diabetes and how controlled it was going in, and research has linked rapidly tightening glucose control right around this time with a higher chance of progression, which is worth discussing with your care team rather than assuming faster is always better.

Weeks 14–27

2nd trimester

This is a common window for active progression, and exam frequency should be individualized, sometimes monthly, based on your starting severity, blood pressure, and how findings are trending, rather than left at the standard once-a-year schedule used outside pregnancy.

Weeks 28–birth

3rd trimester

Even more advanced disease, including proliferative retinopathy, often regresses on its own in the third trimester and after delivery. That pattern shows up on follow-up exams; it is not a reason to skip exams now. Continued monitoring through delivery and into the postpartum year is still recommended for anyone who progressed earlier in pregnancy.

What does the evidence show for diabetic retinopathy progression?

• A clinical review reports 50% progression of retinopathy findings during pregnancy among cases studied, with 5% to 20% of severe nonproliferative cases transitioning to proliferative diabetic retinopathy, and progression of up to 45% seen in cases that already had proliferative disease. These findings generally regressed in the third trimester and postpartum period. 1
• Progression depends on several factors together: the severity of retinopathy at the start of pregnancy, how long someone has had diabetes, glycemic control, and coexisting hypertension. The same review notes that pre-pregnancy laser care for existing retinopathy is linked to roughly half the risk of progression. 1
• Pregnant people with pre-existing diabetes are described as being at high risk for developing or worsening diabetic retinopathy, with guidance to get a comprehensive dilated eye exam promptly and to discuss the right exam schedule with a physician, since untreated progression can lead to bleeding and scarring in the eye. 2
• Pregnancy-related changes that support a growing baby can put added stress on the blood vessels in the eyes, so existing diabetic retinopathy can worsen quickly. People with type 1 or type 2 diabetes need an eye exam before pregnancy or within the first 3 months, with the exam sometimes repeated later in pregnancy and up to a year after delivery. Gestational diabetes, diabetes that occurs only during pregnancy, typically does not cause eye problems and usually does not require these exams. 3
• In a population-based study of 307 women with pregestational diabetes, 25.9% of the 185 women who received adequate retinal screening showed retinopathy progression during pregnancy. Longer diabetes duration (an average of 14.43 years in those who progressed versus 9.79 years in those who did not) and higher blood pressure at the first prenatal visit both significantly raised the odds of progression, and type 1 diabetes progressed more often than type 2 (31.3% versus 11.7%). 4
• In the same study, a greater drop in HbA1c between the first and third trimester was linked to significantly higher odds of retinopathy progression, despite better overall glucose control by the end of pregnancy, an effect the researchers link to rapid improvement rather than to good control itself. Attending prepregnancy care was strongly associated with actually receiving adequate retinal screening once pregnant. 4

When should I call my provider about diabetic retinopathy progression?

New floating spots, streaks that look like cobwebs, or a sudden increase in floaters can signal bleeding inside the eye from progressing retinopathy and need prompt ophthalmology evaluation rather than waiting for your next scheduled exam. A sudden drop in vision, a shadow or curtain across part of your visual field, or new flashes of light also need same-day eye care. Because diabetic retinopathy often has no symptoms in its early stages, do not rely on how your vision feels to decide whether a dilated eye exam is needed; keep the exam schedule your eye care and obstetric teams set for you even when you feel fine. None of these lists replace your own judgment: if this symptom worries you, that on its own is enough reason to check in with your healthcare provider.