Schill W B, Landthaler M
Andrologia. 1980 Nov-Dec;12(6):546-8. doi: 10.1111/j.1439-0272.1980.tb01348.x.
33 subfertile men with idiopathic normogonadotropic oligozoospermia were treated with the non-steroidal antiestrogen tamoxifen. A significant improvement of sperm count, total sperm output and sperm motility was observed.