Objectives: Determine if there is a connection frequency of consumption of 150 g seafood in pregnant women with the status of copper, zinc and selenium from umbilical cord blood and maternal blood. Analyze the influence of copper, zinc and selenium on the anatomical characteristics of the cerebellum (width and length) of newborns using brain ultrasound and analyze differences characteristics with respect to sex. In the same group of children at 18 months of age prenatal exposed to copper, zinc and selenium mass fractions, compare motor, cognitive, and linguistic characteristics and analyze to sex. Determine the influence of additional factors on the anatomical characteristics of the cerebellum (maternal weight before pregnancy, maternal weight growth in pregnancy, maternal and paternal height, parity, maternal education and age, maternal employment status, rural housing, sex, alcohol intake and maternal smoking in pregnancy). Based on the results of the study, make recommendations on the eating habits of the mother during pregnancy with regard to consumption of seafood. Patients and methods: Two hundred and twenty-seven mothers and their children were included in the survey, for which data on frequency of consumption 150 g seafood in pregnant women were collected during previous research. Copper, zinc and selenium mass fractions in maternal and umbilical cord blood were determined in the entire group of subjects. Previous studies have used transfontaneal neurosonography data from the third day of life of the newborn in 49 children to measure anatomical features of the cerebellum (width and length) as well as the results of the Bayley Neuropsychological Test at the age of 18 months in 160 children for the purpose of determining the cognitive, motor and language functions of the brain. Results: Frequency of consumption 150 g seafood in pregnant women contributes to lower mass fractions of copper and zinc in the blood of pregnant women and newborns, and does not affect selenium mass fractions. Frequency of consumption 150 g seafood in pregnant women was not associated with cerebellar size or psychomotor development at 18 months of age. There was no correlation between copper, zinc and selenium mass fractions with cerebellar width. Lower mass fractions of selenium and zinc in the blood of pregnant women were associated with greater cerebellar length. The length of the cerebellum showed weak to moderate predisposing properties for recognizing children whose mothers had low levels of zinc and selenium in their blood. In a multivariate model, we found that the mass fraction of selenium in maternal blood and mass fraction of zinc in umbilical cord blood were independently associated with shorter cerebellar lengths. Cerebellar width ( which did not show significant correlations with micronutrient mass fractions) was negatively associated with psychomotor development in children, more pronounced in male children. The length of the cerebellum did not show a correlation with psychomotor development. Lower mass fractions of copper in umbilical cord blood and higher mass fractions of zinc in maternal blood were associated with better psychomotor development of children in the total sample. There are gender differences, both in psychomotor development at the age of 18 months and in the correlations of micronutrients with psychomotor development. We did not find statistically significant correlations of cerebellar width and length with parameters of interest, as well as with other recorded parametars ( P>0,05 for all analyzes). Conclusion: Frequency of consumption 150 g seafood in pregnant women affects the levels of copper, zinc and selenium in maternal blood and in umbilical cord blood, but does not affect on the cerebellar length and width and the psychomotor development at 18 months of age. Our research suggests that cerebellar length may be a good biomarker for detecting prenatal exposure to zinc and selenium, but not to cooper. The results of the association of prenatal exposure of copper, zinc and selenium and the diet of pregnant women with seafood with the size of the newbornꞌs cerebellum and psychomotor development at the age of 18 months do not affect current guidelines for pregnant women to consume one to two serving of fish or seafood per week.