The aim of this paper was to review research that compared the coarticulation of people of different age groups, and to conclude how much the level of coarticulation and its patterns change with age. The nature of the coarticulation mechanism is still not entirely clear, and research comparing coarticulation across human ages could significantly contribute to further uncovering the characteristics of coarticulation. There is no complete consensus among researchers on whether children coarticulate more or less than adults, but over time more and more research indicates that children coarticulate more than adults depending on the vocal segment. What research has fully confirmed is that children have significantly more variable speech compared to adults. There is little research related to the elderly and teenage years, so we cannot reliably say how much coarticulation there is in those periods compared to adult speakers with typical pronunciation. It seems that adult speakers of typical pronunciation achieve optimal coarticulation values for each speech segment, and children aim to achieve these values during their development.