Natural Family Planning. II. Basal Body Temperature and Estimated Time of Ovulation

Accuracy of the peak day of cervical mucus as a biological marker of fertility

“…The results of the current analysis compares well with the results of previous studies that correlated the PD with the estimated day of ovulation [1][2][3]. The current study results, however, show the PD to be a little more variable.…”

“…A final descriptive comparison is that the fertile period of the current study of 9.5 days (SD = 4.0) was comparable to the 9.6 days in the WHO study and the 9.3 days in the Hilgers and associates study [3,15]. The mean number of peak mucus days in front of the ETO in the current study and the Hilgers study was 4.2 days [3].…”

“…The mean number of peak mucus days in front of the ETO in the current study and the Hilgers study was 4.2 days [3]. The total number of mucus days in front of the ETO was 5.4 days for the current study and 5.9 days for the Hilgers study.…”

“…The Hilgers and associates study results showed that the PD fell ±3 days of the estimated day of ovulation 98.4% of the time, and in the current analysis it was 96.7% of the time (Table 1) [3]. The percent difference could be because of the different means to determine the estimated day of ovulation.…”

“…Hilgers et al [3] used serum progesterone levels to determine the estimated day of ovulation among 24 healthy woman subjects. The peak symptom was defined as "the last day of the clear, stretchy, and or lubricative discharge."…”