Is endoscopy safe during pregnancy?

What does the evidence say about endoscopy during pregnancy?

1. In a review of 48 pregnant patients who underwent endoscopic procedures, 35 were done in the second trimester specifically to steer clear of the highest-risk window for organ formation earlier in pregnancy, and only one case, an esophageal dilation performed in the first trimester, ended in miscarriage. 1
2. A review of GI endoscopy in pregnancy found that when sedating medication is needed, meperidine and propofol are generally considered relatively safe choices, benzodiazepines are usually reserved as a secondary option with midazolam preferred over diazepam, and an anesthesiologist's involvement is recommended to help support both mother and baby during the procedure. 2
3. A review of GI disease management in pregnancy found endoscopy carried a higher chance of preterm birth or a baby measuring small for gestational age, but no added risk of congenital malformation or stillbirth, and it recommended reserving colonoscopy specifically for situations like uncontrolled bleeding, a mass, or a stricture of unknown cause rather than routine screening. 3
4. MotherToBaby's review of surgery and anesthesia exposure in pregnancy found that most studies looking at the first and early second trimester didn't show an increased chance of birth defects, while exposure later in pregnancy has been linked in some studies to preterm delivery, lower Apgar scores, and preeclampsia, which is part of why both timing and indication matter. 4
5. In that same 48-patient review, sedation was generally kept light, with conscious sedation doses of midazolam averaging around 2 milligrams, reflecting a broader pattern of using the lowest effective dose during an endoscopic procedure on a pregnant patient. 1

Is endoscopy safe in each trimester?

• First trimester. This is the highest-risk window for the rare drug-related concerns tied to sedation, so non-urgent endoscopy is typically pushed to the second trimester if symptoms can wait. A persistent bleeding or severe vomiting emergency is evaluated on its own timeline regardless of trimester.
• Second trimester. This is generally the preferred window for a needed procedure, once organ formation is behind you and the uterus isn't yet large enough to complicate positioning. A gastroenterologist and obstetric provider typically coordinate the sedation choice and monitoring together.
• Third trimester. Endoscopy is still possible later in pregnancy for a strong indication, but positioning, sedation, and monitoring get more complex as the uterus grows, and the care team will weigh timing against waiting until after delivery when that's medically reasonable.