Ob-Gyn questions? Ask a gynecologist online.
Hello, I'm Dr Manos MD, board certified obgyn If you are certain that you're not pregnant, then it will probably start over the weekend. If not you might have a persistent corpus luteum and it may require an ultrasound to find out what's going on. For now, wait this weekend through Monday morning. If still late, then get checked. If you had a cone biopsy of your cervix, it's not likely having anything to do with the late period b