Under normal circumstances, eating pineapple during pregnancy will not have any effect, but some pregnant women may experience adverse effects such as allergy or elevated blood sugar. Pineapple has high nutritional value, and under normal circumstances, eating pineapple in moderation during pregnancy can replenish the nutrients needed by the body, which is conducive to the health of pregnant women and the development of the fetus. However, some pregnant women are sensitive, pineapple contains bromelain, pregnant women may have allergic reactions after consumption, resulting in perioral numbness, nausea, vomiting and other uncomfortable symptoms. Moreover, pineapple contains high sugar, pregnant women who consume too much may lead to elevated blood sugar, especially pregnant women who suffer from gestational diabetes are prone to blood sugar abnormalities, jeopardizing the health of pregnant women and the development of the fetus.