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Sperm Cells attracted By Ovary Scent, Even in Weakened State

to be an ideal approach for precisely controlling the chemical gradient and accurately tracking chemotactic events. This combination led to greater repeatability in the experimental conditions over the course of the assays, which is currently not possible with conventional assays. These results are an important first step toward having an easy-to-use platform to rapidly evaluate and quantify chemotaxis." The researchers hope their device will help other scientists more accurately examine the chemotaxis of all types of cells. The method also eliminates the phenomenon of "trapping," which causes study results to become ambiguous.

"The ability to differentiate chemotaxis from trapping helps to determine whether sperm were attracted to the test substance or the swim velocity was reduced close to the test substance," Jacobson said. "In the latter case, the test substance may have had a negative influence on the sperm, resulting in suppression of their movement." Novotny is the Lilly Chemistry Alumni Chair in the Indiana University Bloomington Department of Chemistry, where he also directs the Institute for Pheromone Research.
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