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Periodic Fertility and Sterility in Woman—A Natural Method of Birth Control.

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By KNAUS HERMANNProfessor . , Head of the Clinic for Gynecology and Obstetrics of the German University of Prague; Foreword by MARSHALL F. H. A.Professor . , F.R.S., Cambridge, England. Authorized English Translation by KITCHIN D. H., KITCHIN KATHLEEN. , M.Sc., M.B., B.S., London. 162 pages; 17.5 X 24.5 cm.; 64 illustrations and 12 tables. Wilhelm Maudrich; , Vienna: (book obtainable in U. S. A. and Canada through the Concip Company, Hobart, Indiana). 1934.. Price, $6.00.

Ann Intern Med. 1935;8(8):978. doi:10.7326/0003-4819-8-8-978_1
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This excerpt has been provided in the absence of an abstract.

Both physicians and laymen are now giving much thought to the so-called " safe period," and the subject is being so universally discussed that this translation of Professor Knaus' comprehensive book on "Periodic Fertility and Sterility in Woman" should be read with interest by great numbers of English-speaking people.

Dr. Knaus started his study of the physiology and pharmacology of the uterine muscle in 1924, and in 1927 he discovered a reaction of the uterine musculature by means of which the exact day of ovulation can be determined. Through this investigation and through studies on the viability of the human


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