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Would you trust a smartphone app as a contraceptive?
The Natural Cycles fertility app combines the use of a thermometer to measure body temperature with calendar calculating methods – often referred to as the rhythm method – to work out the days when a woman would be at high or low risk of pregnancy.
More than 4,000 women were included in this Swedish study looking at how effective the app is at preventing pregnancy. A total of 143 unplanned pregnancies occurred during the study period, 10 of which were the result of the app falsely indicating a safe day. Data collected by the app was used to work out that, if used exactly as advised, 5 women out of every 1,000 will accidentally become pregnant, and 7 out of every 100 women will become pregnant for "typical use" (not using the app correctly), each year.
This app may be attractive for women who are unwilling to use other forms of contraception, possibly for religious or cultural reasons, or because they have concerns about the side effects of hormonal contraception.
This app may also help indicate the best days to try to conceive. But an obvious disadvantage of this contraceptive method is that the app does not protect against sexually transmitted infections in the same way as a condom.
Further research weighing an app like this against established contraceptive methods would be required to confirm whether its effectiveness is comparable.
(Source: www.nhs.uk)
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