A woman who bleeds a little during her menstrual period may or may not be pregnant. This can be determined by a gynecological ultrasound and a blood test for human chorionic gonadotropin levels. If pregnancy has occurred, the chorionic gonadotropin level in the blood will be elevated and a gynecologic ultrasound will show the growth of a gestational sac in the uterus. If a woman has a cold or hormone level disorder, endocrine disorder, excessive scraping, etc., which can also lead to a little blood flow during menstruation and a low menstrual flow, a gynecological ultrasound can be done. If the uterus is not enlarged, the endometrium is thick, and the blood test for human chorionic gonadotropin level is in the normal range, estrogen and progesterone-like drugs need to be given for cyclical treatment for at least 3 cycles, and the menstrual bleeding will increase.