*Fecundity is the mass production of new organisms, including fertilization and development of offspring to the stage when they become capable of reproduction."*( https://polit.ru/news/2023/03/22/ps_malikh-slabii/?ysclid=lejz7kp44r )
The total **fertility** rate is an important indicator of population movement in countries with developed market economies. It reflects the scale of mass regional and intraregional migration of the population,