[Prostaglandins and dysmenorrhea effect of naproxen on prostaglandin concentrations in menstrual blood (author's transl)].

: It has recently been demonstrated that prostaglandins play an important role in human reproductive system. The purpose of this study is to demonstrate the involvement of PGs in the onset of menstruation and in the cause of dysmenorrhea. In human endometrium PGF2 alpha were found in large amount in late luteal phase and especially in premenstrual period. PGE1 and PGF2 alpha concentrations in menstrual bloods were 3 to 4 times higher in dysmenorrheic subjects as compared to normal women. The high PGE1 and PGF2 alpha concentration of patients decreased to normal level in naproxen treated cycle. And the intensity of abdominal pain and lumbago decreased simultaneously. On the other hand, in normal woman, naproxen gave little effect on PGs concentration of menstrual fluids. High levels of PGs in dysmenorrheic subjects, decrease of PGs concentration by naproxen treatment and simultaneous alleviation of pain suggest the involvement of PGs in the cause of dysmenorrhea.