Grapes contain vital nutrients like Vitamin A, C, copper, and manganese. These nutrients are essential for prenatal nutrition. However, you should avoid eating grapes in the last trimester because of its heat-producing property. Excessive consumption of grapes can be toxic due to its high levels of resveratrol, which may negatively impact blood pressure and cholestrol. Hence, it is best to consult your doctor before having grapes muscadine during pregnancy.