RADIATION SAFETY MANUAL

The closing of the fertile window can thus be determined by peak plus three days of drying up after day 14. For example, in a given cycle if a woman observed her last day of most fertile mucus on day 13 and has dryness on days 14, 15, and 16 (peak + 3), she would be considered to have low fertility even though her cycle-day probabilities would ... ................
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