• Clean the thermometer before and after each use, see
“Maintaining the unit“.
• Protect the unit against high temperatures and direct sun-
light.
• On no account should you open or make alterations to the
device (except when changing the battery). This is a med-
ical product.
Unit description
Measuring the wake-up temperature
Take the measurement wherever possible at roughly the same
time of day, immediately after waking up, but before getting
up.
Changing the battery
1. Change the battery when the battery symbol flashes in the
display:
Should not be mistaken for the full control display when
turning on the thermometer.
2. To do so, pull off the battery compartment cover towards
the rear.
Prior to measurement do not eat and avoid physical exertion.
To switch the device on, press the On/Off button. A short beep
sound will signal “Thermometer on”. At the same time, a
visual display of the full controls will appear. All display ele-
ments should become visible.
The measured value of the last measurement is displayed:
Evaluating the measured data
Enter the measured values in a cyclotest® chart. Use a new
chart for each cycle. Start the entries on the first day of your
regular period (= 1st cycle day). Regular periods differ from
intermenstrual bleeding in that they are accompanied by typ-
ical drop in temperature.
• The thermometer contains small parts (battery, etc.) which
could be swallowed by children. For this reason, do not
leave the unit in the hands of children unsupervised.
Battery compartment cover
On/Off button
Display
Flexible sensor tip
Sensor
3. Carefully pull the battery holder about 1 cm out of the cas-
ing.
4. Do not use a metal object to push the battery out of its
holder.
5. Insert a new battery (type LR41 or SR41, 1.55 V), with the +
sign towards the top.
6. Push the battery holder back into the casing and replace
the battery compartment cover. Take care not to damage or
misalign the seal when doing this.
Before measuring, you should have slept for at least 5 hours.
If you have had an insufficient period of sleep, skip the meas-
urement and do not enter a measured value.
You can take the measurement orally, rectally or vaginally, but
you should then stick to the point of measurement you have
chosen. Measuring under the arm (axillary) produces inaccu-
rate results. It is therefore unsuitable for measuring the basal
body temperature. We recommend that you take the meas-
urement under your tongue with your mouth closed.
Place the sensor tip in one of the two heat pockets under your
tongue to the left or right of the root of the tongue. The sen-
sor must make good contact with the tissue.
The flashing “°C” in the display indicates that the new meas-
urement has started.
Then an internal test value of 37.00 °C (± 0.02 °C) appears.
The thermometer switches into measurement mode.
The determined measured value remains stored until the next
measurement.
The unit confirms that the measurement has been successful
with a repeated beep and indicates the measured tempera-
ture in the display.
Please always wait until the measurement has finished before
removing the thermometer from the point of measurement.
This can take a few minutes in some cases.
The unit switches itself off approx. 8-10 minutes after the
measurement has finished. You can also switch off the ther-
mometer yourself before this by pressing the On/Off button.
Sexual intercourse (V), fever (E), taking of medication/drugs
(M) or sleeping medication (S), insufficient sleep (wS),
change of climate (K), consumption of alcohol (A), emotional/
mental strain (B) or physical exertion (kA).
Also make a note on the chart of special factors and influences
which could alter the temperature, for example:
Also make a note on the chart of bleeding and mucus qual-
ity: regular period (R), heavy, moderate, light intermenstrual
bleeding (sZ, mZ, gZ), spotting (SB) and if possible also the
appearance and nature of the cervical mucus.
Carefully kept charts are important diagnostic indicators and
should always be taken with you to doctor’s appointments.
This is recommended particularly in the event of cycle irreg-
ularities.
Ovulation which occurs roughly in the middle of the cycle is
definitive for pregnancy planning and for contraception. The
basal body temperature increases 1-2 days after ovulation by
0.2 – 0.5 °C. A drop in temperature of approx. 0.1 °C is fre-
quently to be observed directly before the day of ovulation.
The increased basal body temperature remains at roughly the
same level until the next regular period and then drops again
(see specimen curve).
Significant deviations from this sequence indicate cycle irreg-
ularities or pregnancy.
Replacement charts (Art. No. 70600004, PZN 01498580) are
available from all good pharmacies or directly through the
cyclotest® service hotline.
Application for natural family planning
An egg remains capable of being fertilised for just a few hours
after ovulation, sperm remains capable of fertilising an egg
for 2-4 days. Fertilisation of the egg (conception) can there-
fore only occur on the last 5 days before the temperature in-
crease described above.
Determine the fluctuation of your ovulation day over several
cycles as exactly as possible – this will provide you with a good
picture of when you can expect your fertile phase. If the tem-
perature remains high after the rise for longer than 18 days,
you are in all probability pregnant.
The “strict form” of the temperature method (sexual inter-
course only from the third day of the temperature rise until
the next regular period) is almost as reliable as the pill - by
entirely natural means, without taking medication or using
mechanical (non-hormonal) measures.
Temperature method
Even the “extended form” of the temperature method is still
just as reliable as mechanical (non-hormonal) contracep-
tives. Here you can also have sexual intercourse in the period
from the start of the regular period up to six days before the
day of the temperature rise. In exact terms: From the earli-
est day of the temperature rise which you determine from at
least 6 successive cycles, count back 6 days.
Here the temperature method is combined with observing a
“symptom”, the mucus at the neck of the uterus.
Symptothermal method
A regular period is usually followed by a phase of infertile,
“dry” days in which no so-called cervical mucus can be ob-
served. A few days prior to the fertile phase the mucus causes
a sticky-moist feeling at the entry to the vagina. Spinnbarkeit
(stretchability), clearness and strong fluidity are character-
istic.
If you now make these observations 3-4 days before the tem-
perature rise, you can be certain that this temperature rise
has occurred in response to ovulation. To this end, take a look
at your cervical mucus once a day during the corresponding
time period.
Close your mouth and breathe easily through your nose so
that the measurement result is not compromised by inhaled
air.
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