1. 
   missed period
   The failure of menstruation to occur in any month at the expected time. ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?missed+period
   
   
2. 
   Missed Period
   Failure of menstruation to occur in any given month. While the most common cause of a missed period is pregnancy, there are other causes which include stress, illegal drug use, weight gain, weight loss, medication usage and birth control methods.
   Found op http://www.pregnology.com/AZ/M/5
   
   
3. 
   missed period
   Type: Term Definitions: 1. the failure of menstruation to occur in any month at the expected time.
   Found op http://www.medilexicon.com/medicaldictionary.php?t=67132
   
   

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