Creatures is what it’s referring to
        
                    
             
        
        
        
Part of your SOCIAL environment
        
             
        
        
        
Infertility and In Vitro Fertilization. ... Unlike the simpler process of artificial insemination -- in which sperm is placed in the uterus and conception happens otherwise normally -- IVF involves combining eggs and sperm outside the body in a laboratory. Once an embryo or embryos form, they are then placed in the uterus.
 
        
             
        
        
        
Answer:
More than half of those were the result of cheerleading activities. The National Center for Catastrophic Sports Injury Research study proved that cheerleading is certainly the most dangerous sport for women; more dangerous, in fact, than all the other women's sports combined. 
Explanation:
Because Your doing Dangerous stunts... which can result in injury such as broken bones, strain, head injury's ect. :>