Successful separation of X and Y and spermatozoa in human and bull semen

Using particle free semen extender and applying a low temperature thermal convection laminar flow to bring the sperm cells in vertical orientation and allowing them to act through the center of buoyancy, a bimodal distribution was achieved. Laser scanner for observing sedimentation pattern and F-body technique for identification of male sperm were used. Specimens from five human donors and ten bulls were separated, checked for purity, and frozen in liquid nitrogen. The lighter fractions contained 59.4% male (P less than 0.01), the heavier fractions 63.5% female (P less than 0.01), and the nonprocessed semen 48.0% male cells. Over 10,000 cells were counted to arrive at this statistically significant result. Observed sex ratio closely matched the predicted purity figures. Lighter and heavier fractions were further purified using forced convection galvanic method. Seventy to eighty percent purity in both fractions was confirmed by F-body and small cell galvanic migration tests with human as well as with bull semen.