The term IN EARLY DEVELOPMENT can be summarized as the stage of development in which a fetus is growing and maturing. This stage begins at conception and continues until birth. During this time, the fetus is developing organs, bones, muscles, and other body systems. It is a critical period of growth and development that will determine the health of the baby after birth. The crossword solution for this term is FETAL, which refers to the unborn baby during this stage of development.