Real examples of malformations caused by drinking tea during pregnancy. Dietary habits during pregnancy have a vital impact on the growth and development of the fetus, but there are some misunderstandings that can lead to some adverse consequences. In traditional Chinese culture, tea is regarded as a healthy drink, but if pregnant women drink too much tea, it can lead to fetal malformations. Below we use a real example to analyze the harm of excessive tea drinking to the fetus by pregnant women. Fact case: In a city in Fujian, a couple liked drinking tea very much after becoming pregnant, especially black tea. They drank several drinks a day, and the child was diagnosed with a cleft lip deformity after birth.