The absence of your normal menstrual cycle. This can indicate a pregnancy or it may be related to an illness or stress. It is considered one of the major possible signs of pregnancy. Though in your life time you may have a missed period for a variety of reasons. It may also simply be delayed and not missed at all.
Also Known As: late period, skipping a cycle
Examples: Pregnancy tests usually require that you have missed a period prior to using them for the detection of pregnancy.