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Habitual alcohol consumption associated with reduced semen quality and changes in reproductive hormones

Tina Kold Jensen, Mads Gottschau, Jens Otto Broby Madsen, Anne-Maria Andersson, Tina Harmer Lassen, Niels E. Skakkebæk, Shanna H. Swan, Lærke Priskorn, Anders Juul, Niels Jørgensen

BMJ Open 2014;4:e005462

Editor's comment:
High habitual alcohol intake in young men may affect not only their general but also their reproductive health, as is shown in this study where the authors investigated the association between semen quality and serum reproductive hormones and alcohol consumption in a cohort of 1221 young Danish men. A habitual alcohol intake was found to be associated with a reduction in semen quality already from more than 5 units/week in a typical week although the decreasing trend was most apparent for men with a typical weekly intake above 25 units. Recent alcohol intake was associated with an increase in serum testosterone and reduction in SHBG. No independent adverse effect of binging on semen quality was found. However, it was difficult to separate binging from typical alcohol intake as most young men who binged also had a high habitual alcohol intake. 

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