How would a decline in sperm concentration over time influence the probability of pregnancy?

Epidemiology

PubMedID: 15232407

Slama R, Kold-Jensen T, Scheike T, Ducot B, Spira A, Keiding N. How would a decline in sperm concentration over time influence the probability of pregnancy?. Epidemiology. 2004;15(4):458-65.
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