Billings natural FP method: correlation of subjective signs with cervical mucus quality and ovulation.
Daily self-appraisal of the degree of vulvar humidity sensation by highly motivated and trained volunteers was correlated to actual cervical mucus quality patterns and time of ovulation. Sixty-two ovulatory cycles were studied. Humidity degrees reported by the women showed a highly significant correlation with simultaneous values of cervical mucus spinnbarkeit and crystallization. On the other hand, ovulatory days were also closely related to the days reported with maximal (+++) humidity degree. In summary, the correct appraisal of vulvar humidity may provide consistent information on both cervical sperm penetrability and ovulation predictions; these in turn could complement each other in ascertaining the potentially fertile period of the cycle.
D002582:Cervix Mucus / Q000502:physiology*; D005193:Family Planning Services; D005260:Female; D006801:Humans; D006813:Humidity; D010061:Ovulation Detection / Q000379:methods*; D014844:Vulva / Q000502:physiology