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Hyperviscosity can impair normal sperm movement in the female reproductive tract, and can lead to decreased sperm count.
It can, however, be used for establishing whether populations exposed to dangerous ecological conditions or to drugs which are known to adversely affect spermatogenesis, have reduced sperm count by comparison to appropriate control groups.
This method can not only minimize damage to the sperm structure, but also increase the effectiveness of selection.
In general, a healthy lifestyle can improve sperm quality.
Interestingly, these alterations in sperm quality occur well ahead of decreased sperm counts in the ejaculate.
Finally, our approach indicates that sperm storage capacity of the female is higher than assumed from counts of spermathecal sperm.
As male fertility is to some extent correlated with sperm count the results may reflect an overall reduction in male fertility.
Three points are emphasized: (1) the treatments analyzed in this study can improve SPA values in some of the patients with low sperm penetration capacity; (2) of the treatments studied, sperm refrigeration resulted in the largest improvement in sperm penetration capacity; and (3) sperm refrigeration can increase fertilization and PRs during IVF in this select group of patients.
These results confirm that quantity can at least partly compensate for poor sperm quality.
Reduction of both sperm retrieval failure and unnecessary ovarian stimulation can be achieved by combination of these methods.
These effects alter sperm parameters.