Measuring your temperature
During the course of the female cycle, body temperature follows a distinct pattern. At the beginning of the menstrual cycle, it tends to be somewhat lower. Within a maximum of 48 hours after ovulation, it increases by a few tenths of a degree. The fertile and infertile phases of a woman’s cycle can be identified by recording and interpreting these temperature results.1 To ensure the reliability of the results, this method should not be practised by women with irregular menstrual cycles or irregular night rest (shift work, travel).
Take a look at how the pearl index of this method compares to that of other approaches.
The cycle computers by cyclotest have proven themselves as helpful support since they are based on precisely the method presented here. Because the computers are equipped with a measuring sensor and pre-programmed algorithms, temperature information is collected and evaluated easily and conveniently. Furthermore, an additional symptom relating to ovulation may also be collected and entered into the calculation.
Source: 1 Malteser Arbeitsgruppe NFP (Hrsg.): Natürlich und sicher. Das Praxisbuch. 18. Auflage. Stuttgart 2011.