After the ovulation of the coitus appeared stomach uncomfortable situation, often with the following factors: the first, after the ovulation of the corpus luteum formation, the corpus luteum itself will appear a small amount of bleeding, the corpus luteum in the pressure increases will cause stomach uncomfortable situation, the vast majority of people often ignore and do not feel. Secondly, after ovulation, the follicular fluid will flow into the uterine rectal cavity, which will also cause discomfort when stimulated during intercourse. Clinically, this condition is mostly untreated. However, if the stomach discomfort is coupled with pain in the lower abdomen and anal swelling, this situation must be considered internal bleeding or inflammation, and must go to the hospital for ultrasound examination, mainly to find out whether there is a large amount of fluid in the pelvis.