Dear Sasie Periods are too late, because of hormonal changes, stress, tension etc. also, but, if there has been any unsafe sex before, it would be wise for her to take a home pregnancy test. Do this, soon. Also consult a specialist or registered doctor at the earliest. Read here also: https://lovematters.in/hi/resource/menstrual-cycle https://lovematters.in/hi/our-bodies/my-periods-are-irregular-what-should-i-do https://lovematters.in/hi/resource/unplanned-pregnancy https://lovematters.in/hi/pregnancy/home-pregnancy-tests-dos-and-donts If you would like to join in on a further discussion on this topic, join our discussion board, "Just Ask” https://lovematters.in/en/forum