Chachamama, I dont know if they do it for both genders. So far from what I am reading, it is successful for ds. I am going to try to find out for you. Soon as I find out I will post it here.
Redcin, I googled (Sperm separation using electrical charges) and came up with several articles, if you want to give that a go. Otherwise here is the link I posted before that you couldnt open:
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1440-169X.1986.28s1_35.x