When pregnant women often drink cola during pregnancy, it will have certain effects on the fetus, mainly because of the following points: 1) The caffeine content of cola is relatively high, and caffeine can enter the blood circulation of the fetus through the placenta, which may lead to abnormal development of the fetus. 2) The caffeine content of cola is stimulating to a certain extent, which may lead to intestinal cramps in pregnant women, causing abdominal pain and other symptoms. 3) Caffeine can also stimulate the nervous system, which may lead to irritability, sleepiness and other adverse reactions. Caffeine can also stimulate the nervous system, making pregnant women irritable, insomnia and other adverse reactions, which can be harmful to the body of pregnant women, and may lead to miscarriage or preterm labor. Therefore, during pregnancy, we must stay away from cola and other drinks, and should drink more freshly squeezed fruit juice, which can increase immunity and is non-toxic and harmless.