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Efficacy of pulsed electromagnetic wave versus low-level laser therapy in treatment of primary dysmenorrhea: a randomized trial



Primary dysmenorrhea is defined as pain during menstruation, and it affects participation in daily activities.


This study was conducted to compare and add evidence between the effect of pulsed electromagnetic wave and low-level laser therapy (LLLT) in the treatment of primary dysmenorrhea.

Participants and methods

A total of 50 female students complained of primary dysmenorrhea, with age ranging from 16 to 22 years and BMI from 18.5 to 25 kg/m2. They were divided randomly into two equal groups – group A comprised 25 female students who received Pulsed electromagnetic field, and group B comprised 25 female students who received LLLT. Samples of blood were taken before and after treatment to detect the level of prostaglandins in blood. Present pain intensity scale (Ppi) is used for the assessment of pain before and after treatment.


There was a significant reduction (P<0.05), in prostaglandin level in both groups post-treatment; when comparing between groups there was no statistical significant difference (P>0.05), whereas there was a clinical difference in favor of group A. In addition, there was a statistically significant reduction (P=0.0001) post-treatment in Ppi scale in both groups. When comparing between both groups, there was a significant reduction (P=0.0001), in Ppi and this significant reduction was in favor of group A.


The results of this study suggested that both pulsed electromagnetic waves and LLLT are effective methods in the treatment of primary dysmenorrhea, with better effects of pulsed electromagnetic waves than LLLT.


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Correspondence to Eman Abd El Fatah Mohamed PhD.

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Abd El Fatah Mohamed, E. Efficacy of pulsed electromagnetic wave versus low-level laser therapy in treatment of primary dysmenorrhea: a randomized trial. Bull Fac Phys Ther 22, 53–58 (2017).

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  • dysmenorrhea
  • low-level laser therapy
  • prostaglandin
  • pulsed electromagnetic waves