Eating watermelon in moderation during pregnancy generally has no effect on the fetus, but excessive consumption may have an effect. Under normal circumstances, pregnant women eat watermelon in moderation will not jeopardize the health of the fetus, and watermelon is rich in water, sugar, as well as carotene, vitamin A, calcium, phosphorus, vitamin C and other nutrients, consumption can supplement the body’s nutritional needs, which is conducive to the development of the fetus. But pay attention to moderation, excessive consumption may increase the burden on the gastrointestinal tract, causing gastrointestinal discomfort, etc. In addition, the watermelon sugar content is relatively high, if pregnant women combined with gestational diabetes mellitus, consuming too much watermelon is likely to lead to hyperglycemia produces a huge child, jeopardizing the pregnant woman’s own health and fetal development. In addition, pregnant women during pregnancy should pay attention to diet and nutritional balance, coarse and fine grains, meat and vegetables with reasonable, as far as possible to avoid spicy and greasy and other stimulating foods.