Miscarriage can take place anywhere from just a few days after conception, up to twenty or twenty-four weeks. The earlier the miscarriage, the less the symptoms; less bleeding, less cramping. The earlier the miscarriage is usually the embryo is very small and hardly formed. The actual trauma of the miscarriage is, sometimes, not that serious. Many times, nothing has to be done. As the pregnancy proceeds, as it becomes farther and farther along, it becomes more serious, more serious bleeding, perhaps, a serious hospital-type procedure has to be done to make sure the uterus is clean. Sometimes there is infections. Sometimes there is more serious cause of the miscarriage that has to be looked into. Fortunately, late miscarriages are quite uncommon.