The aim of this follow-up study was to investigate the effect of birth weight, infant nutrition, past and contemporary social status and anthropometry on systolic and diastolic blood pressure in adult subjects. There were 465 boys and girls, originating from three different regions of Croatia, examined in the first three years of life, and again approximately 18 years later. The analyses showed that birth weight was inversely related to systolic blood pressure in adult subjects. The highest systolic pressure was found in subjects with the lowest birth weight and the greatest current body mass index. Relative weight in the first three years of life was also inversely related to systolic blood pressure, but only in adult males. Neither the type of milk given, nor the duration of breast feeding and the time of weaning had any significant influence on blood pressure in adult subjects. According to multivariate regression analyses, the significant predictors of higher systolic and diastolic pressure in adult males were: lower father's height, greater current body mass index, lower birth weight and low original social status. In female subjects, the significant predictors were: lower birth weight, greater current body mass index and lower social class of origin. In conclusion, influences of poor environment acting in early childhood may be important determinants of blood pressure in adulthood.