On the 13th day after artificial insemination, it is usually possible to determine whether the pregnancy is successful by drawing blood. Generally, there are no special signs at this time, but some patients may experience constipation, which is due to the slowing down of bowel movement caused by progesterone medication, coupled with the fact that after the artificial insemination surgery, most patients have less exercise, which may easily cause constipation. Doctors suggest patients to eat easy-to-digest food, more vegetables and fruits with high fiber content and less spicy food after the surgery. On the 13th day after IUI, if there is no pregnancy, menstruation is about to start at this time, and some patients will experience back pain, backache, breast swelling and other signs before menstruation. If you are already pregnant, the time of embryo implantation is still relatively short, usually there will be no early pregnancy reaction, but some patients may experience increased leukorrhea, breast swelling and pain, drowsiness and other phenomena. There is also a part of the pregnant patients will be in the early stages of pregnancy a small amount of vaginal bleeding, mistaken for menstruation, in fact, is a sign of pregnancy aura miscarriage, or signs of adverse pregnancy. Then all these symptoms mentioned above are actually non-specific. There is an appeal to the manifestation of symptoms, can not be absolute judgment of pregnancy or not. So on the 13th day or so after IUI, the patient should go to the hospital to have blood tests under the proper guidance of the doctor to determine whether she is pregnant or not.