Taking watermelon cream tablets without knowing that you are pregnant does not have a significant effect on the fetus. Watermelon cream tablets are over-the-counter medications that do not affect the fetus, especially within 18 days of the formation of the fertilized egg. Ordinary medications will not affect the fertilized egg, unless the side effects of radiotherapy or chemotherapy are more severe, which will affect the formation of the fertilized egg and lead to miscarriage, which is not conducive to the fertilization of the egg, and will not lead to fetal malformation. If the pregnancy is confirmed and the fertilized egg is born, then taking drugs with strong side effects can affect the growth and development of the fetus and lead to fetal malformation. It is important to pay attention to this after pregnancy is confirmed and not to take drugs casually.