The term 'developmental stage' refers to the different stages of growth and development that a person goes through in their lifetime. LATENCY, the 7-letter solution, is the period of time between childhood and PUBERTY when physical growth slows down and psychological development continues. EMBRYO, the 6-letter solution, is the earliest stage of development in which an organism develops from a single cell. PUBERTY, the 7-letter solution, is the stage of development when a person's body matures and they become capable of sexual reproduction. Finally, PHASE, the 5-letter solution, is a stage in a process of change or development.