Aunt mostly refers to the menstruation, one week pregnant abdomen with the feeling of menstruation, may be due to hormone level stimulation, preterm miscarriage, ectopic pregnancy and other reasons. 1. Stimulation of hormone levels: After the first pregnancy, due to the body’s human chorionic gonadotropin, progesterone, estradiol content will increase, so some women may experience abdominal distension, with the feeling of menstruation. 2. Pre-eclampsia: For those who are one week pregnant, the feeling of menstruation in the abdomen may also be due to pre-eclampsia, which may be accompanied by a small amount of vaginal bleeding. 3. Ectopic pregnancy: After suffering from ectopic pregnancy, especially when the gestational sac grows and develops in the fallopian tube, it will cause hidden pain or distension in the lower abdomen, and some women will manifest the feeling of menstruation. If you are pregnant for a week and have the feeling of menstruation in your abdomen, if the symptoms are mild and there are no other abnormalities, you can observe them first, while for more serious symptoms or other abnormal symptoms, it is recommended to consult a doctor in a timely manner.