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RRM Academy Synopsis
In a 1958 lab study of cervical mucus from apparently healthy women, radioactive sodium appeared to pass quickly after the period and slowly near ovulation. The authors call the work preliminary.
The study is a bench experiment on mucus samples, and the paper gives no count of women. The authors describe their method as approximate and their approach as preliminary. The result suggests a cyclic change in how ions move through mucus in an unspecified number of women. The authors reason that slow movement at midcycle may reflect water held tightly to the mucus, and they tie it to higher viscosity. The paper reports no pregnancy or fertility outcome.
Cervical mucus changes through the cycle with the hormones acting on the cervical glands, a point the authors cite from earlier work. Fertility awareness-based methods build on that changing secretion. The Creighton Model and other mucus-observation methods teach women to chart it. This 1958 measurement adds one physical property of midcycle mucus.
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