AOL Health News By Mallory Creveling Scientists have moved one step closer to giving men more responsibility in preventing pregnancy.University of North Carolina researchers are beginning trials to see if ultrasound can serve as a means of reversible contraception for men, BBC News reports. Based on the researchers' earlier work, a blast of ultrasound to the testes may safely stop sperm production for six months.With this contraceptive, men become temporarily infertile after the testes stop producing sperm and all "sperm reserves" have been depleted, according to BBC News. "We think this could provide men with up to six months of reliable, low-cost, non-hormonal contraception from a single round of treatment," Dr. James Tsuruta, the study's lead researcher, told BBC News. Researchers hope this will offer couples an alternative for birth control."Our long-term goal is to use ultrasound from therapeutic instruments that are commonly found in sports medicine or physical therapy clinics as an inexpensive, long-term, reversible male contraceptive suitable for use in developing to first world countries," Tsuruata said.A $100,000 grant from the Bill and Melinda Gates Foundation will fund more clinical trails on this potential birth control method.