[In-vitro stimulation of sperm motility using a deproteinized hemodevivative and a luteinizing hormone]

The effect of a commercial deproteinized blood extract--on motility of human spermatozoa was examined in vitro. The improvement of motility as seen after addition of 5 and 10 percent of this deproteinized blood extract, is supposed to be due to amounts containing different concentrations of LH. The extract was ruled out as a source of kallikrein, but not as a source of kininogens.