The author has included in this book a great deal of material on tests for pregnancy both from his own experience and from the literature. Though it is written in a cumbersome style, contains many typographic errors and is poorly printed, it is nevertheless a valuable work. The many pregnancy tests proposed by different investigators are considered briefly with respect to their virtues and their deficiencies. Only the Friedman modification of the Aschheim-Zondek test survives the author's critical analysis as more nearly meeting the necessary qualifications of rapidity and reliability than any of the others. The major portion of this small volume is devoted to a detailed discussion of the theory and practice of the latter method. Various technical modifications are considered by the author; included also are many practical pointers designed to facilitate execution of the test and to render its interpretation more reliable.