|DEVELOPMENTAL STAGE |CHARACTERISTICS |
|Prenatal Period |The hereditary endowment, which serves as the foundation for later development, is fixed, once and for |
| |all, at this time. While favourable or unfavourable conditions both before and after birth will affect to|
| |some extent the physical and psychological traits that make up this hereditary endowment. |
| |Favorable conditions in the mother’s body can foster the development of hereditary potentials while |
| |unfavourable conditions can stunt their development, even to the point of distorting the pattern of |
| |future development. |
| |At few if any other times in the life span are hereditary potentials so influenced by environmental |
| |conditions as they are during the prenatal period. |
| |The sex of the newly created individual is fixed at the time of conception and conditions within the |
| |mother’s body will not affect it; as is true of the hereditary endowment. Except when surgery is used in |
| |sex transformation operations, the sex of the individual, determined at the time of conception, will not |
| |change. Such operations are rare and only partially successful. |
| |Proportionally greater growth and development take place