Question: When I was fourteen years old, I had the monthly period and I did not tell my family about it. In Ramadaan, I did not fast for five days and did not make up for them. I did the same thing for three years. When I got married I made up for these days, but I did not pay expiation for them. Am I obligated to pay expiation for breaking my Sawm (Fast) in those days?
Answer: It is an obligation upon a woman who starts getting her monthly period to fast Ramadaan. Not making up for the missed days of Sawm due to menstruation is a mistake committed by the questioner, and she should repent to Allaah from that… read more here.