'autogenetically' originates from Greek, specifically the word 'autogenēs' (αὐτόγενής), where 'auto-' meant 'self' and 'gen-' (from 'genēs') meant 'born' or 'produced'.

'autogenēs' entered New Latin/modern scientific vocabulary as 'autogenesis' meaning 'self-generation'; from this the adjective 'autogenetic' was formed in English and later the adverb 'autogenetically' was derived.

Initially, it referred literally to being 'self-born' or 'self-produced'; over time it came to be used more broadly in science and general language to mean 'arising spontaneously or internally,' a sense retained in the modern adverb 'autogenetically'.