Amenorrhea is the absence of periods. Primary amenorrhea is where there has never been onset of the menstrual cycle, whereas secondary amenorrhea is where the menstrual cycle has ceased. This mix can help to regulate the female reproductive cycle which can help to bring on and regulate the period.
There are other factors which also need to be considered such as low body weight, high athletic performance and stress which can all cause irregularities in the menstrual cycle.
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McDowell's staff Herbalists can not diagnose you or your companions disease or illness. What they can do is offer a herbal program to assist with healing, after you have had advice from your doctor or specialist. If you have unexplained pain or symptoms, seek medical advice.