I am writing this mail for my friend. Her marriage was happened in february. She is a 22 years old girls. After marriage first month menses blood came up to 5 days. Then next two month menses came in correct time. But menses blood came only two days one time in a day. That also very light blood spot. Actually what is the problem for her body? Why continuous menstrual blood is not coming up to four or five days like before marriage?