The corpus luteum is formed partially after the follicle ruptures and the ketone body is a result of ketoacidosis caused by a reduction in food intake for some reason, hence the ketone body (+). In gynecology, the result of ketone body (+) is often caused by severe pregnancy vomiting during early pregnancy and very little food, which requires rehydration fluids for treatment and checking for ionic disorders, and then deciding on the amount of rehydration fluids and which fluids to rehydrate according to the specific situation. It is recommended that if ketone body plus is present, active treatment is recommended.