'Afọ ime,nke amakwa dịka 'ibu nwa n’afọ,bụ ogeotu nwa maọbụ karịa dị n’ime afọ nwaanyị. Inwekarị otu nwa nke akpọrọ ejima[[]]. Nwaanyị pụrụ ịdị ime mgbeya na nwoke nweere mmekọahụmaọbụ mgbe eji nka n'ụzụ bekee mee ka okwe omume. Ọ na-anọ ihe ruru izu 40(ihe ruru ọnwa 10)mgbe nwaanyị hụsịrị nsọ ya ma nọgidezie ruo mgbe ọmụrụ nwa ahụ. Nke a bụ ihe dịka izu ụka 38nwaanyị tụụrụ ime. An embryo is the developing offspring during the first 8 weeks following conception after which the term fetus is used until birth. Ihe eji ama na nwaanyị atụrụla ime gụnyere ahụzighị nsọ ya, inwe obere ara,, agụụ ịgụ ya mgbe mgbe na ịnyụ mamịrị. A na aga n’ụlọọgwụ eme nchọpụta ma nwaanyị ọdị ime. Oge afọ ime kere ụzọ atọ. Nke mbụbụ site n’otu izu ụka ruo izu ụka iri na abụọbụ mgbe atụụrụ ime. ịtụrụ ime n’esonye mgbe akwa nke si na mkpụrụ ndụ nwokebanyere n’oghere nke nọ nso n’akpa nwanke ga-ebidoghọọ obere nwa ọhụrụ[[]][[]]. N’oge a, ime n’apụkarị ụmụ nwaanyị[[]](nke na nwa ahụ nwere ike ịnwụ n’afọ)