عنوان مقاله [English]
The present study was conducted with the aim of comparing the season of birth and the average chronological and biological age of parents of slow-paced students with Down's syndrome and parents of normal students. The statistical population consisted of the parents of elementary students in the 6th, 11th, 13th, and 15th districts of Tehran that in the academic year of 2021, at least one of their children was enrolled in the primary schools of this region. Therefore, 80 families (40 parents of normal children and 40 parents of children with Down syndrome) were selected as a statistical sample. The research method was causal-comparative. To collect information, children's season of birth, chronological and biological age of parents of students with Down syndrome and normal students at birth were used. the t-test of two independent groups and the two-way chi-square correlation test were used to analyze the data. The SPSS24 software was used for data analysis. The results showed that, there was a significant difference between the average scores of chronological age and mothers' age and biological age of fathers with children with Down syndrome and normal children at birth in two groups. These differences in biological age of fathers were also significant. Probably, in order to suggest to mothers about the health of biological age at the birth of their children, the necessary trainings can be given to them, so that a step can be taken to reduce the possibility of having a child with Down syndrome.