Compare the birth season and the mean Chronological age and Biological age of parents of students with Down syndrome and parents of normal students at birth

The aim of this study was to compare the birth season and the mean calendar and biological age of parents of normal students and Down syndrome at birth. The statistical population of the present study consisted of the parents of primary school students in the 6th 11th 13th and 15th districts of Tehran, which in the academic year 2021.Therefore, 80 families were selected as a statistical sample (40 parents with normal children and 40 parents with children with Down syndrome) .The research method is comparative based on the implementation method. For data collection, children's birth season, calendar age and biological age of parents of students with Down syndrome and normal students at birth were used and independent t test and chi-square square test were used to analyze the data. Data analysis was performed by SPSS24 software.Based on the results, there was a significant difference between the mean scores of chronological age and age of mothers and biological age of fathers with children with Down syndrome and normal children at birth in the two groups. The results showed that mothers with children with Down syndrome have higher chronological and biological age than mothers with normal children.These differences were also significant in the biological age of the fathers. Therefore, it is suggested that in order to make mothers aware of the effects of biological age on the birth of their children, they should be given the necessary training so that an effective step can be taken to reduce the probability of having a child with Down syndrome.