A human child is known as an embryo up to eight weeks after fertilisation/conception. It is afterwards referred to as a Foetus, from the end of the eighth week after conception to the moment of birth, as distinguished from the earlier embryo.
It is from the eight week that the embryo begins developing features and characteristics of a human infant, as opposed to having been previously indistinguishable from an embryo of any four-legged mammal.....
