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A double method sperm wash for artificial insemination.

Recently, there have been concerns regarding the presence of reactive oxygen species (ROS) produced during sperm processing for insemination. However, the sperm wash methods that yielded low ROS levels also had low sperm recovery after processing. The objective of this study was to compare sperm recovery after swim-up from pellet, overlay, and 2-layer Percoll wash methods with the recovery after the double method wash. The latter method consisted of a combination of 2 sperm wash methods, namely, the overlay and the Percoll method. Motile sperm were first collected through the overlay method. The leftover semen was then processed through the 2-layer Percoll method to scavenge motile sperm and the resultant pellet combined with the pellet from the overlay method. In this manner, the level of ROS was kept to a minimal, sperm recovery was improved, and a mixture of sperm with different surface properties was produced as a result of using different processing methods. The results indicated an improvement in sperm recovery and in total sperm motility in noncryopreserved sperm after using the double method wash when compared with the other wash methods. The study suggests that the double method wash is a feasible method for processing sperm for insemination.

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