Diarrhea after in vitro transfer depends on the nature of the diarrhea, if it is ordinary diarrhea, the stomach is not very painful, no discomfort in the abdomen after discharge, the stool is slightly thin, no urgency, no foul smell, you can take some montelukast or drink some hot water and continue to observe. If the stool smells bad and the abdominal pain is severe, you may need to go to the hospital to check the stool routine to determine if there is any other infection, maybe dysentery or something like that. If you feel no discomfort after diarrhea, you can choose to continue observation, which is usually not a big problem. Some patients may have diarrhea even with natural pregnancy, but they are not aware of it, so it is not a big problem and they can continue to observe.