this is for my fren who has regular periods,30days cycle.the problem is on the 30th day and next 2days only mucus spotting with a blood tinge happens.then it is followed by stingy clotted blood through out the period.there is no dysmenorrhoea before or during periods.has occassonal pain and fullnessin breast 7 days before menses.usg is normal.laparoscopy normal.is this related to any hormonal change.would that affect pregnancy in future?