I found today’s BBC coverage somewhat sensational and ill informed. If we are talking facts, typical use effectiveness of the pill is 91% or 9 out of 100 women falling pregnant. Typical effectiveness use of Natural Cycles is 93% or 7 out of 100 women falling pregnant. So yes, it is still more effective than the pill if used correctly.
Where it goes wrong is people don’t take account of things/events to upset the basal temperature and still rely on it regardless, i.e. you had an all night bender, your BT is useless and way off, you cannot apply it. You were woken up by your baby 4 times in the night, your BT is no good the next morning. You went to the loo after waking up without thinking, you cannot measure now. You are under the weather, your BT is not suitable. You are jet-lagged, you are hungover etc etc The user has to have a stable lifestyle, little/no drinking or late nights, not a shift worker, not someone who travels across time zones routinely.
And the app needs time to learn about you and your patterns, it is not abandon all caution on day 1 of use. Whatever happened to good old common sense.
If your lifestyle is chaotic exciting and your sleep often disturbed, this method is not going to be suitable for you.
And yes, you can get pregnant on the pill, all it takes is a short episode of Diarrhoea or vomiting and voila. Or more commonly forgetting to take a pill/ doing so later than normal. All the while having the pleasure of being a depressed, fat and devoid of libido individual thanks to the contraceptive.
NFP involves a fair bit of discipline, common sense and dare I say intelligence from the user. This is why you will never catch a doctor recommending it. They don’t want to rely on your good sense, while they can insert an implant and they know it WILL be working, even if you feel like s* on it. It is effective as far as medical profession is concerned, same with Mirena coil. Nobody is particularly interested how it affects women’s quality of life. There is now a defined link between hormonal contraception and depression. And we all know about uncontrollable weight gain, loss of sexual desire, increased risk of stroke, increased risk of cancer, deep vein thrombosis etc etc
NFP is free of any side effects/ health risks, this is why it is so attractive. It does require discipline, diligence and common sense though. It is not something you can inject and forget about for 3 months, it needs constant conscientious input.