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 lifetime you may have a missed period for a variety of reasons. It may also simply be delayed and not missed at all.
Many women will go through various cycle abnormalities in their life. This is not necessarily a problem, but can make trying to get pregnant or diagnose pregnancy more difficult for some.
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.