| http://www.w3.org/ns/prov#value | - After controlling for factors such as the women???s age, the nature and duration of their infertility, the number of embryos used and the day on which they were transferred into the uterus, researchers found an even greater effect of therapeutic laughter: the women who were entertained by a clown were 2.67 times more likely to get pregnant than those in the control group. (More on Time.com: 5 Preg
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