Abstract
Summary
By an improved method increased concentration of the follicle stimulating factor and the presence of luteinizing factor can be demonstrated in the blood of cyclical, menstruating women during the 9th to 12th day of the cycle. 2. In the urine a similar accumulation of both factors was noted between the 10th to the 14th day. 3. The presence of the luteinizing reaction has hitherto been associated with pregnancy and chorionepithelioma.
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