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RRM Academy Synopsis
A 1958 laboratory study of human cervical mucus samples found that sodium stayed fairly constant while phosphorus climbed as the mucus held more dry matter. Swedish researchers measured both elements in cervical samples. Sodium did not track dry matter in these samples.
The report is a short 1958 laboratory measurement paper. Its method, activation analysis, makes sodium and phosphorus in a tiny sample radioactive so each can be counted. Results appear in one chart, and the text gives no count of samples or women. Phosphorus and dry matter rose together in those samples, which is a correlation. The authors suggest phosphorus may roughly indicate how many cells a sample holds. No fertility outcome was tested and no couples were followed.
Fertility awareness-based methods chart cervical mucus across the cycle, so the makeup of that mucus matters to them. This paper adds early laboratory evidence on its chemistry. The report has no charting data and no pregnancy outcomes.
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