The Human Life Cycle
- Life Phase Age Interval Duration Example Event(s)
- Prebirth
- Zygote Conception a few seconds Recombination
- Embryo 1 day-2 mo 2 months Development
- Fetus 2-9 mo 7 months Growth
- Preadult
- Infant 0-14 mo ɭ yr totally dependent
- upon mother
- Toddler 14-24 mo ə yr entering human
- society
- Child 2-13 yrs 11 yrs uses language
- Adolescent 13-17 yrs 5 yrs sexual maturity
- Adult 18+ years 60+ years most child-
- rearing,