Abstract
This paper is a preliminary report on work being done to prove that nausea and vomiting accompanying pregnancy are due to an allergic reaction of the patient to the secretion of her own corpus luteum graviditatis. This symptom complex is one which has been confronting the medical profession for centuries, the first record being made by Soranus of Ephesus1in the year 20 A. D. Various authors2state that in from one half to two thirds of all obstetric cases there is nausea and vomiting to some degree during the first few months of pregnancy. So numerous have been the theories as to the etiology of this symptom complex3that in this brief report no effort to discuss them will be made. The treatments recommended3have been as variable and numerous as the theories of etiology. The patient exhibiting nausea and vomiting may have these symptoms

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