Here are the possible solutions for related to the earliest period of human culture clue
Answer
Clue
Relevancy
eolithic
Clue
Related to the earliest period of human culture
Definition
of or like an eolith
embryo
Clue
Human's earliest life stage
Definition
the entity which develops in a woman's womb until it is born as a baby, esp. up to about eight weeks, after which it is known as a foetus, also EMBRYON