'Fertility Awareness-Based Methods' and subfertility: a systematic review.

Facts Views Vis Obgyn · 2014 · PMC4216977 · PMID 25374654

Europe PMC

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an increasing trendno p-value reported

Previous studies showed that more oestrogen-type mucus is present in the fertile days of the menstrual cycle, but also an increasing trend in the amount of mucus secretions can be noticed.

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