ZYGOTE: from conception to two weeks gestation. Rapid cell division
EMBRYO: 2 weeks-8 weeks eyes, fingers, toes, and most internal organs form but are not fully functional
FETUS: 9 weeks to birth ❤️ is almost completely developed at 10 weeks, completely developed at 7 months and viable at 32 weeks.
TODDLER: Age 2 or 3 , I didn't talk until I was 3 so I may or may not have been talking When this picture was taken. I could walk and do things on my own.
OLD AGE: harder to recall info, decay of fluid intelligence or intelligence that helps in solving new problems.