From a Reuters article of the same title on MSNBC.com:
Israeli doctors have turned to a novel method to boost success rates of fertility treatments -clowning around. Although funny men with red noses and big feet are popular on children's wards in hospitals they are rarely, if ever, seen entertaining women trying to get pregnant. But after introducing clown therapy to patients having in-vitro fertilization, doctors at Assaf Harofeh Medical Center in Zerifin, Israel, said the conception rate rose from 20 to 35 percent.
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