Women are very attached to faith, in which case they try to take a fast. But if your periods have started during the fast, then you should not keep fast. Actually, women have many problems like loss of appetite, stomach ache, dizziness, constipation and weakness during the menstrual cycle. In such a situation, if you keep fast then your health can also get worse. Therefore, one should not take fast at such times, but keep fast when you are well.