1) The embryonic process of human embryonic development lasts about 280 days and is divided into three periods: initial (1st week), embryonic (2-8th week) and fetal (from the 9th week to birth).
2) Post-embryonic: divided into three periods: pre-reproductive, maturity (reproductive) and aging (post-reproductive).
Such features give maximum survival and adaptation to the environment of the offspring.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.