? The first attempt in cloning was conducted in 1952 on a group of frogs. The experiment was a partial success. The frog cells were cloned into other living frogs however, only one in every thousand developed normally , all of which were sterile. The rest of the frogs that survived grew to abnormally large sizes. In 1993, scientist and director of the in vitro lab at George Washington University, Jerry Hall and associate Robert Stillman, reported the first ever successful cloning of human embryos. It was the discovery of in- vitro fertiliz ....