No, I didn’t say it was more exact about fertility. I said that it is either/or. If in the development of the method, it was determined that there was even the slightest chance of conceiving, then it is considered a fertile day. There is no “chancing it” or “safer” days. It is one or the other.
I am not familiar with this being a teaching in the STM. I have used it for 7 years. It has always been fertile/infertile, not “sort of fertile.” I think I am just misunderstanding your definition of “conservative use.” Conservative use, to me, means you do not have relations on fertile days. Those who conceive obviously had relations on a fertile day whether they acknowledged that day as fertile or not.
To the OP and in general:
I have found that some confusion on methods exist because of the limited availability of information. The Sympto-Thermal method was developed by the Kippleys in the late 1960s. There are people who observe all of the
signs observed in the Sympto-Thermal method, but are not using the Sympto-Thermal method. They are using a self-taught method based on the signs.
Perhaps it is those who are misinterpreting the signs based on being self taught that has led to a confusion about what the ST method is and what it isn’t. The signs are there on all women. But
interpreting those signs correctly is what makes a couple succeed with their method, whether TTC or TTA. The Sympto-Thermal Method is the interpretation of those signs.
I have found that I really like knowing and using all of the signs of fertility. Depending on circumstances I am likely to rely more heavily on one sign over another. Post-partum it has been my cervical observations that are the most reliable. My temps are the most reliable when not breast-feeding. I have often wanted to develop a more Creighton understanding of mucous, but there are no teachers in my area.
Of my signs, my mucous is the most unreliable, but it has led me to fix the health problems that make it so. When I am healthy, my mucous is easy to interpret. When I am sick, it becomes more difficult. I am so thankful for my temps since they led to my diagnosis of low thyroid. But, yes, getting temps while being up and down all night for breast-feeding can be frustrating. I chart my fertility all the time even when we aren’t TTC or TTA. I just really like to know what is happening with my body.
I still have hope that we can all overcome the “battle of the methods” mentality. There are pluses and minuses to all of them. If I had the money and the time I would study them all.