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How the Billings Ovulation Method™ Works The Peak of Fertility
How the Billings Ovulation Method™ Works The Peak of Fertility
| The Peak of Fertility |
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 The last day of the slippery sensation is the most fertile day of the cycle. This will have been preceded by a changing developing pattern over a number of days. The last slippery day is called the Peak of fertility, because it is the day when intercourse is most likely to result in a pregnancy. It is important to realise that it is not necessarily the day of most mucus. The slippery, lubricative sensation may last a day or two after the visible signs of mucus, in which case you are still highly fertile – the sensation is the most valuable symptom.Studies show that ovulation usually occurs within a day of the Peak. A World Health Organisation trial indicated that over 90% of women can identify the fertile phase and the Peak day of fertility in the first month of observation and charting. Whilst an experienced user of the Billings Ovulation Method™ can often recognize her Peak day as it is occurring, it can only be verified the following day when she no longer feels slippery. The change after the Peak day may be to dry or sticky, occasionally damp, but definitely not slippery. Once the Peak has been recognized the Peak Rule can be applied. 
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