###Human: Missed periods and pregnancy test is negative. Kindly advise. ###Assistant: Hi. Have you done the blood pregnancy test (hCG)? It could have been a chemical pregnancy meaning non-viable early pregnancy. You can take medicines for withdrawal bleeding like Norethisterone 5 mg twice a day for five days. You will get periods after you stop the medicine. The bleeding might start by 4 to 14 days. Did the radiologist mention the endometrial thickness?