Nausea and vomiting occur when you are pregnant, but after drinking soda, you don’t vomit. The main reason is that soda is alkaline and stomach acid is acidic, so the combination of acid and alkali makes you not vomit temporarily, but only temporarily. Since the estrogen in the body increases during pregnancy, the mucous membrane of the gastrointestinal tract may become slightly edematous, so nausea and vomiting will occur again. It is not until about ten weeks of pregnancy when the placenta gradually forms and the estrogen in the body does not rise as fast that the pregnancy vomiting situation is relatively relieved, and around the third trimester the phenomenon of pregnancy vomiting will disappear completely. Therefore, if you drink soda for pregnancy vomiting, it will only temporarily stop the vomiting and cannot achieve a complete cure.