Objective: improving medical knowledge and successes in increasing the survival rate of high risk infants introduced future development of these children. Objective of This study was correlation between high-risk pregnancy and developmental delay in children 4-60 months.

Materials & Methods: This correlation descriptive study on 401 mothers and children 60-4 months that were visited in health services centers affiliated to University of Medical Sciences in 1388. Sampling was done in several stages. "Ages and Stages Questionnaire" completed by samples, as well as child anthropometric measurements were taken by the researcher with the meter and scale. The data analyzed by software SPSS 18 and Independent T, Man-Whitney and Logistic regression tests were used.

Results: The results showed that the average age of children in low-risk pregnancy group was 22±16 month and high risk pregnancy group 18.9±14.8 month and their gender was female. The mean age of mothers in low-risk pregnancy was 26.31 year and 27.56 year in high risk pregnancies, they had high school education and homemaker. Prevalence of high risk pregnancies was 92% and the prevalence of developmental delay was 18.7%. Multiple pregnancies, low birth weight, habitual abortions, maternal medical disorders in pregnancy, gestational diabetes had significant correlation with developmental delay of children. In the logistic model male gender, low birth weight, family marriage and maternal medical disorders in pregnancy showed significant correlations with developmental delay of children. Also BMI, social and economic status showed probability value close to significant level and other variables of high risk pregnancy had no correlation with developmental delay of children. There were no correlation between high risk pregnancy and developmental delay in children also its domains (P=0.06).

Conclusion: It is unlikely that developmental delay in children occurs due to a factor of high risk pregnancy, because these factors are opposed environmental and genetic effects. Biological, maternal and environmental factors should be considered as possible causes of developmental delay in children.