The author has studied in this paper the correlation between egg form and sex of chicks at hatching time. Two me- thods were tried: in one the eggs were separated in two groups according to the edge form, round or alonga te; in the other the eggs were classified into two types according to te relation between the minor and the major diameter and above or under the relation mean. In both cases it was found that the egg form has no influence on sex. The sex determination of the pullets was made by the method of JAAP, improved in our Department by JARDIM.