The Authors have studied the case of abortive quintuplets born in Taranto, Italy, on June 15, 1952, as the ninth parturition of a 35 years old woman, with a history of twin heredity on the father’s side.

According to anamnesis and to objective examination, the fetuses appear to have five months of intrauterine life. On the basis of sexes (two males and three females) and of the annexes’ findings, the hypothesis of a trizygotic quintuplet set is suggested. Concerning the hereditary mechanism of twinning the Authors state that the genetic twinning factor (G factor) is not specific either by quality (MZ, DZ) or by quantity of the twins it produced.

As far as the age estimate of the twin fetuses is concerned, they state that the diagnosis, rather than on quantity data, is to be based on the quality ones, and specially on the ossification -nuclei detected by X-rays.

The Authors from the examination of a group of pedigrees belonging to subjects with allergopathies conclude that in their observations allergopathies behave like monomeric dominant forms with little penetrance. Afterwards they propose an explanation of the relative excess of sick persons in the discordant marriages and of the remarkable incidence of pollinosis.

After some brief considerations about the etiopatogenesis of the hereditary deafness, and the modern classification of its different nosologic pictures, the AA. pass on to consider four cases of female sex, two sisters and two cousins of mother side, with hereditary familiary deafness, apparently boun to the sex. All the four cases are characterized by the identity of the audiometrie findings, after the « Law of the symmetry of the hereditary deafness ».

The AA. discuss at least the modality of the hereditary transmission and the anatomopatologic picture of the morbide form.

The Autors show a case of research of maternity in the subject of alteration of social condition in comparison of two newborns, this is a case in which a maternity staded could be excluded, and a maternity denied could be recognized, on the base of the genotypes in connexion to the qualities of the specific-groups Rh.

The gynaecological exam of the two women and the determination of the types ABO and MN had not allowed the complete solution of the problem which was, on the contrary, reached and showed by the acknowledgement of the genetics formulas Rh.

Report of a case of unilateral aplasia in mirror-image form of the kidney and the corresponding ureter in monozygotic male twins.