In this descriptive cross-sectional study, the documentary method and secondary analysis have been used. This study aims to identify the most influential population of the Iranian family (birth and divorce), in the face of the second population zone of globalization and rationalization has changed to a comprehensive understanding of family population change. In this study, the role of demographic cognitive variables as an objective symbol in relation to the sociological changes of the family with a mental title is very important. Because there is a two-way relationship between the object (registration statistics) and the mind (people's sports attitudes). The results showed that the age of mothers in the country has increased. The highest number of births in the provinces belongs to mothers aged 25-29 and the lowest number of children to mothers over the age of 49. The result of comparing the births of 139 with 13897 age group of mothers, showed that the first rank of childbearing has changed from 20-24 years old mothers to 25-29 years old. Women under the age of 15-24 living in rural areas are more likely to have children than urban women in the same age group. According to the theory of the second population, the higher the development in a society, the lower the rate of growth and marriage. .... تفاصيل المقالة