Amenorrhea is the nonattendance of monthly cycle — at least one missed menstrual periods. Ladies who have missed at any rate three menstrual periods straight have amenorrhea, as do young ladies who haven't started feminine cycle by age 15. The most widely recognized reason for amenorrhea is pregnancy. It’s not about having irregular periods. On the off chance that you have amenorrhea, you never get your period. In spite of the fact that it is anything but a sickness, you should enlighten your primary care physician concerning it, since it may be a manifestation of an ailment that can be dealt with.