A period is the part of the menstrual cycle when a woman bleeds from her vagina for a few days. For most women this happens every 28 days or so, but it’s common for periods to be more or less frequent than this, ranging from day 21 to day 40 of their menstrual cycle. It is a very important process that a female goes through in her life and any kind of stress can leads to its delay which is obviously not a good signal. Sometimes getting a late period for 3-4 days is normal but if it is always so and about a month or more late than it needs to be treated well before time.