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In #women has only 24 hours each month in which they can become pregnant? above, there is a link to Calendar-based_contraceptive_methods. That article says that such methods have a 25% pregnancy rate per year in typical use. I was about to post an angry note that this is terrible efficiency; the sex ed classes I had in France insist that using calendar-based methods work if you want to get pregnant but should not be relied on to avoid getting pregnant.
Then I looked at other contraceptives and saw that the pregnancy rate per year in typical use is around 20% for (male or female) condoms, and even hormonal methods are not really close to 0 but more like 5%-ish, see table in Birth_control#Methods. That leads me to two questions:
As I understand it, and this seems to be supported by our articles sympto-thermal methods are not calendar methods. They are a form of fertility awareness or fertility based methods but they use both symptoms and temperature hence "sympto" and "thermal". Sympto-thermal are generally considered a subset of symptoms-based methods since they are using symptoms but they will need the thermal aspect to be sympto-thermal. (I suspect there are sources which treat sympto-thermal as a distinct set from symptom based methods i.e. symptom based means no use of basal body temperature.)
Calendar-based contraceptive methods are another subset of symptoms-based methods, the subset that only uses a single symptom namely the first day of bleeding. From what our articles say, I think some sources may exclude calendar based methods from symptoms-based methods completely because only one minor symptom is used. Symptoms-based methods is instead reserved for more sophisticated methods. And I think home computerised Fertility testing is also starting to become a thing.
To be clear while there may be some used of a calendar in some of the other methods, what I'm saying is that
Calendar-based contraceptive methods generally refers to methods which only use the first day of ovulation and a calendar rather than more information like cervical mucus or basal body temperature or position of the cervix. Note also that while the Calendar-based contraceptive methods article does say "Some sources may treat the terms rhythm method and fertility awareness as synonymous
", from what I can tell this means the term fertility awareness is restricted to the normal meaning of the rhythm method rather than the rhythm method being used to include more sophisticated methods. I.E. Affirming what I said earlier, I see little evidence that calendar-based methods is used much for more sophisticated methods at least by decent sources.
For these reasons fertility based methods is probably the clearest term which includes calendar based methods and more sophisticated symptom based methods including sympto-thermal methods. (I earlier said fertility awareness, but forgot this can refer to a specific method per our article.)
Nil Einne ( talk) 13:13, 10 November 2018 (UTC)
I want to contrast the differences between neurons and cardiomyocytes in humans with the differences in cardiomyocytes in the squid. I am aware squid have two-chamber hearts. However, I am having trouble finding information on *squid* *cardiomyocytes* because I keep getting all this irrelevant information on the giant squid axon contaminating my search results and barely any information on the giant squid cardiomyocyte. Help? Yanping Nora Soong ( talk) 19:21, 6 November 2018 (UTC)
Science desk | ||
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< November 5 | << Oct | November | Dec >> | Current desk > |
Welcome to the Wikipedia Science Reference Desk Archives |
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The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
In #women has only 24 hours each month in which they can become pregnant? above, there is a link to Calendar-based_contraceptive_methods. That article says that such methods have a 25% pregnancy rate per year in typical use. I was about to post an angry note that this is terrible efficiency; the sex ed classes I had in France insist that using calendar-based methods work if you want to get pregnant but should not be relied on to avoid getting pregnant.
Then I looked at other contraceptives and saw that the pregnancy rate per year in typical use is around 20% for (male or female) condoms, and even hormonal methods are not really close to 0 but more like 5%-ish, see table in Birth_control#Methods. That leads me to two questions:
As I understand it, and this seems to be supported by our articles sympto-thermal methods are not calendar methods. They are a form of fertility awareness or fertility based methods but they use both symptoms and temperature hence "sympto" and "thermal". Sympto-thermal are generally considered a subset of symptoms-based methods since they are using symptoms but they will need the thermal aspect to be sympto-thermal. (I suspect there are sources which treat sympto-thermal as a distinct set from symptom based methods i.e. symptom based means no use of basal body temperature.)
Calendar-based contraceptive methods are another subset of symptoms-based methods, the subset that only uses a single symptom namely the first day of bleeding. From what our articles say, I think some sources may exclude calendar based methods from symptoms-based methods completely because only one minor symptom is used. Symptoms-based methods is instead reserved for more sophisticated methods. And I think home computerised Fertility testing is also starting to become a thing.
To be clear while there may be some used of a calendar in some of the other methods, what I'm saying is that
Calendar-based contraceptive methods generally refers to methods which only use the first day of ovulation and a calendar rather than more information like cervical mucus or basal body temperature or position of the cervix. Note also that while the Calendar-based contraceptive methods article does say "Some sources may treat the terms rhythm method and fertility awareness as synonymous
", from what I can tell this means the term fertility awareness is restricted to the normal meaning of the rhythm method rather than the rhythm method being used to include more sophisticated methods. I.E. Affirming what I said earlier, I see little evidence that calendar-based methods is used much for more sophisticated methods at least by decent sources.
For these reasons fertility based methods is probably the clearest term which includes calendar based methods and more sophisticated symptom based methods including sympto-thermal methods. (I earlier said fertility awareness, but forgot this can refer to a specific method per our article.)
Nil Einne ( talk) 13:13, 10 November 2018 (UTC)
I want to contrast the differences between neurons and cardiomyocytes in humans with the differences in cardiomyocytes in the squid. I am aware squid have two-chamber hearts. However, I am having trouble finding information on *squid* *cardiomyocytes* because I keep getting all this irrelevant information on the giant squid axon contaminating my search results and barely any information on the giant squid cardiomyocyte. Help? Yanping Nora Soong ( talk) 19:21, 6 November 2018 (UTC)