You can eat watermelon in moderation when you are pregnant, while paying attention to a balanced diet. Watermelon contains a lot of water as well as sugar, amino acids, carotene, niacin, B vitamins, vitamin C, phosphorus, potassium, magnesium and other substances, which can provide energy and nutrients for the mother and fetus, and is conducive to the growth and development of the fetus, so you can eat watermelon when you are pregnant. But watermelon contains high sugar content, so pay attention to moderation, to avoid excessive intake at one time. In general, we should pay attention to dietary diversity, to ensure balanced nutrition, avoid picky eating. Keep a regular routine and do not engage in too strenuous exercise. Go to the hospital for regular checkups to ensure the healthy growth of the fetus.