The paper shows that persons who have passed matriculation differ from the rest of the population in marital status and the number of live births. Marriage frequency among male students is higher, and that among female students lower, than that for the urban population of the same age. The proportion of childless marriages is smaller among male students than among the rest of the population. The trend of fertility has been different for students as compared with other males of the same age. Fertility among students (of 1910 and 1920) has risen and among the rest of the population of the same age it has fallen. The most striking difference between the students and the rest of the population is to be found in the fact that for the students there is a positive and for the rest of the (urban) population a negative correlation between income and number of children. Finally, the data suggest that among Swedish students there may be a slight positive correlation between intelligence and number of children.