NFP coverline question (sympto-thermal)

[Fidelia]

Question for anyone familiar with symto-thermal

I have not been charting online lately, a cycle or two ago I stopped bothering, so I only have a paper chart to describe.
Here’s the information:
Today is Day 14. I have shorter cycles (usually 24 days) and usually ovulate around day 10 or 11. This cycle, I want to think it was day 11. We follow the rules in Toni Weschler’s book Taking Charge of Your Fertility for drawing the coverline, but can’t find anything in the book saying that there is a minimum temperature that it should be.
My temps for days 6 through 11 are: 97.2, 97.2, 97.2, 97.1, 97.1, 97.2. Then on day 12, it was 97.4. That is 2/10 of a degree higher than the previous 6, and she says the first time that happens is when you draw the coverline 1/10 degree higher than the highest of those previous 6, which in this case would be a coverline at 97.3.
I have never had a coverling this low before. Though I have had as low as 97.5 or 97.6.
As far as CF goes, peak day was day 11 (with eggwhite) (the day before the temp rise to 97.4). (it is not unusual for my peak CF day to be O day itself). So, on day 12 (97.4) we were wondering if we consider that the temp rise or not.
Day 13 my temp was 97.7, and day 14 (today) it was 97.9.
So, should we consider day 12 the ovulation day and draw the coverline according to day 13’s 97.7 being the rise, or go with the first rise, that coincides with my CF, but results in an unusually low coverline?
Thanks for reading all that!

 

[SonCatcher]

I understand you are charting for the 3[sup]rd[/sup] day after peak day and the 3[sup]rd[/sup] day of thermal shift, correct? (Our NFP method is slightly more conservative and demands 4 days after peak)

From the rules you have written here, it looks like you should draw the coverline at 97.3 and assume fertility for today.

 

[Fidelia]

I understand you are charting for the 3[sup]rd[/sup] day after peak day and the 3[sup]rd[/sup] day of thermal shift, correct? (Our NFP method is slightly more conservative and demands 4 days after peak)

From the rules you have written here, it looks like you should draw the coverline at 97.3 and assume fertility for today.

Yes, so today is both the 3rd day of the thermal shift and the 3rd day after CF peak. I just wanted to make sure we were right that the rule for the coverline still stands, even if it looks like an unusually low coverline.
Thanks.

 

[SonCatcher]

Yes, so today is both the 3rd day of the thermal shift and the 3rd day after CF peak. I just wanted to make sure we were right that the rule for the coverline still stands, even if it looks like an unusually low coverline.
Thanks.

Sorry for the incomplete response. From the rules posted, it looks like day 13 was the first day of thermal shift and that today is the second.

The rule that took day 12’s 97.4 to adjust the coverline to 97.3 seems to indicate that the 97.4 reading should be counted as a pre-shift temperature. I think that was in the event that the post-shift temperatures did not reach the [sup]4[/sup]/[sub]10[/sub] degree change required (97.4 to 97.7 is only [sup]3[/sup]/[sub]10[/sub]).

 

[Fidelia]

Sorry for the incomplete response. From the rules posted, it looks like day 13 was the first day of thermal shift and that today is the second.

The rule that took day 12’s 97.4 to adjust the coverline to 97.3 seems to indicate that the 97.4 reading should be counted as a pre-shift temperature. I think that was in the event that the post-shift temperatures did not reach the [sup]4[/sup]/[sub]10[/sub] degree change required (97.4 to 97.7 is only [sup]3[/sup]/[sub]10[/sub]).

Maybe we have slightly different sets of rules. What we learned and use is that the first temp that is 2/10 degree higher than the previous 6 is when you draw the coverline 1/10 degree higher than the highest of the previous 6. Re-adjustment would only be needed if the temp dropped below the coverline within the three-day count.
So, your first response did make sense, but I am now a bit confused by what you mean.

 

[jilly4ski]

Maybe we have slightly different sets of rules. What we learned and use is that the first temp that is 2/10 degree higher than the previous 6 is when you draw the coverline 1/10 degree higher than the highest of the previous 6. Re-adjustment would only be needed if the temp dropped below the coverline within the three-day count.
So, your first response did make sense, but I am now a bit confused by what you mean.

Probably slightly different rules. It sounds like SonCatcher is a CCL sympto-termal. It sounds like you have a “strong thermal shift” which is defined as

On three consecutive days, valid or undisturbed temperatures form this pattern.

1. the first two are at least 2/10 above the Low Temperature level.
2. The last temp is at or above the High temp level (High temp level is 4/10 above the Low temp level)

Which means you can follow the rule that phase 3 states on the evening of the 4th day of drying up past peak, crossed checked by 3 (or more) days of overall or strong thermal shift pas peak.
That would be the CCL (Rule B) rule. Actually they might not teach it like that anymore as they have apparently streamlined and simplified their method.

Or CCL another rule (Rule R)
Where phase 3 starts on the evening of the third day of drying up past peak, cross checked by 3 consecutive days of strong thermal shift past the peak day.

 

[SonCatcher]

Maybe we have slightly different sets of rules. What we learned and use is that the first temp that is 2/10 degree higher than the previous 6 is when you draw the coverline 1/10 degree higher than the highest of the previous 6. Re-adjustment would only be needed if the temp dropped below the coverline within the three-day count.
So, your first response did make sense, but I am now a bit confused by what you mean.

The thing that confused me is that you said you should draw the coverline 1/10 degree higher due to day 12 being 2/10 degree higher than the rest. That made day 12 only 1/10 degree higher than the coverline, which seems an inadequate shift.

Jilly is correct that that I am more familiar with CCL’s rules. We would have drawn the line at 97.2 (a single anomalous temperature doesn’t affect it).