Pregnant women are advised not to drink Coke in early pregnancy. Coke is a highly carbonated beverage containing many preservatives and food additives, and the embryo in early pregnancy is in a vigorous period of differentiation and development of various organs. Certain carbonic acid components in cola will stimulate the gastric mucosa, make the stomach feel full and affect the digestive function. The body is affected by the increased secretion of HCG and progesterone in early pregnancy, which affects the gastric digestive function, making it easy to have nausea, vomiting, acid reflux and indigestion. The health of the mother and child will be affected. After drinking carbonated beverages such as Coke, pregnant women may suffer from calcium deficiency, which is detrimental to the development of the fetus.