Relationship of a Hemolysin Resembling Anti‐Tj^a to Threatened Abortion in Western Australia

Abstract

This is a preliminary report on the occurrence in Western Australia of a hemolysin resembling in specificity, but not identical with classical anti‐Tj a . It was found in sera of pregnant women who threatened to abort. Complete absence of the hemolysin in a similar group of non‐pregnant aborters, normal pregnant women, and a large group of husbands, suggest that the presence of “anti‐Tj a ‐like” hemolysins is associated with pregnancy. However, attempts to demonstrate hemolysins in a similar group of aborters in the United States and Canada have thus far been negative.