Genesis on diamonds II: contact with diamond enhances human sperm performance by 300%

Earlier we reported that the vitality of human sperm cells increased by 20% after 42 hours contact with nanocrystalline diamond coated Petri dishes, as compared to polystyrene Petri dishes. Herein we show that 1 hour contact with the nanodiamond Petri dishes enhanced the number of grade A motility human sperm cells (sperm cells that are swimming in a rapid progressive motility) by ~300%. Notably, the increase of the fraction of sperm cells with optimal motility was on cost of the low and non-motile sperm cells.