title: Seminal plasma magnesium and premature ejaculation: a case-control study.
abstract: OBJECTIVE
  To determine the relationship between premature ejaculation (PE) and serum and seminal plasma magnesium levels, in a case-control study.
  
  
  METHODS
  Thirty-eight patients referred to the authors' urology outpatient clinic were evaluated in two groups; cases comprised 19 men complaining of PE, defined using the Diagnostic and Statistical Manual of Mental Disorders IV criteria and an intravaginal ejaculatory latency time (IELT) of <1 min, and a control group of 19 married men with a normal IELT. All men had a history taken, a systemic physical examination and laboratory studies. After organic and psychogenic disorders were excluded, the 19 patients were included in the study. Seminal plasma and serum magnesium levels were determined using atomic absorption spectrophotometry.
  
  
  RESULTS
  The mean (sd) plasma magnesium level was 94.7 (10.9) mg/L in the cases and 116.7 (11.6) mg/L in the controls. There was a significant relationship between seminal plasma magnesium, but not the plasma level, and PE (P < 0.001 and 0.597 respectively).
  
  
  CONCLUSIONS
  PE is significantly related with a lower level of seminal plasma magnesium. The pathological physiology of this relationship requires more investigation.
authors.affiliation: Urology Research Center of Sina Hospital, Tehran University of Medical Sciences and Health Services, Iran. MD_aloosh@hotmail.com
authors.forename: Mehdi
authors.initials: M
authors.lastname: Aloosh
authors.forename: Mohammad
authors.initials: M
authors.lastname: Hassani
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Nikoobakht
mesh_terms: D000328:Adult; D015992:Body Mass Index; D016022:Case-Control Studies; D004542:Ejaculation / Q000502:physiology*; D006801:Humans; D008274:Magnesium / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012661:Semen / Q000737:chemistry*; D012735:Sexual Dysfunction, Physiological / Q000378:metabolism*
chemical_list: D008274:Magnesium