The reasons why women have abdominal pain a week after ovulation are: a. Because of sexual intercourse during ovulation, if the egg and sperm can combine and develop into a fertilized egg, it will be transplanted to the uterine cavity for 7 days to grow and grow, and because the endometrium will react to the fertilized egg with rejection, there will be strong uterine contraction, so there will be abdominal pain. Second, the presence of endometrial inflammation, pelvic inflammatory disease and ovarian cysts in women is not excluded. When a woman gets cold after ovulation or eats unclean food resulting in gastrointestinal discomfort, it will also lead to abdominal pain. When women have abdominal pain, it is best to go to the hospital to do gynecological ultrasound and blood tests, due to the occurrence of pregnancy can pay attention to proper rest, first temporary observation, if not pregnant, consider the occurrence of gynecological inflammation caused by the need to give anti-inflammatory drug treatment, but also consider the gastrointestinal tract indigestion reaction caused by hidden pain, you can give a light diet and anti-infective drug treatment.