Gestational diabetes itself does not typically cause diarrhea as a direct symptom, but several related factors during pregnancy can contribute to digestive changes. Gestational diabetes is a temporary condition affecting blood sugar regulation during pregnancy, and its primary symptoms are usually absent or mild—many women have no symptoms at all and only discover it through routine screening. However, the underlying metabolic changes and hormonal shifts of pregnancy that increase diabetes risk can affect digestion. Additionally, some of the dietary modifications recommended for managing gestational diabetes—such as increased fiber intake or altered meal composition—may influence bowel movements. Pregnant women more broadly experience constipation more frequently than diarrhea due to hormonal effects on the digestive tract, but individual responses vary. If diarrhea develops during pregnancy, it's more likely related to general pregnancy hormones, dietary changes, prenatal vitamins, or other gastrointestinal conditions rather than gestational diabetes specifically. The medications used to treat gestational diabetes (typically insulin or metformin) can occasionally affect digestion, with metformin sometimes causing gastrointestinal symptoms in some patients. Any new or persistent digestive symptoms during pregnancy warrant discussion with a healthcare provider, as they may indicate other conditions requiring attention or simply reflect normal pregnancy-related changes.