26
Gently stretch the vulva open to make it easier to insert
the probe and slide it into the vagina to the depth of
about 8 centimetres (3 inches), considering the breed and
size of the bitch, until resistance is felt (when the end of
the probe reaches the cervix). In some females resistance
is not easily felt.
In the cervix area there is the highest concentration of
vaginal mucus which is needed to obtain a correct read
-
ing.
Note! For larger bitches it may be necessary to insert
a probe deeper to reach the cervix os (as these bitches
have a longer vagina).
It is necessary to insert the probe at a suitable angle (com
-
pare with the gure), which is dierent for dierent bitch-
es but usually ranges from 25 to 45°.
This angle varies for dierent breeds, animal sizes and
even individual bitches. Sometimes it is even sharper and
the probe has to be inserted almost vertically.
Inserting the probe at the right angle will signicantly fa
-
cilitate the measurements, make them safe and accurate
and will not cause any discomfort to the examined bitch.
Study carefully the drawing that presents the bitch’s gen
-
ital system and the need to insert the probe at the cor-
rect angle.
After inserting the probe into the vagina to the appropri
-
ate depth, rotate the probe 360° so that the electrodes
come into full contact with the vaginal mucus.
Measurements can be made by directing the probe to
-
wards the upper or lower cervical perimeter or towards
the sides of the cervix, towards the horns (approximately
towards 1 and 11 o’clock looking at the clock dial).
It is necessary to rotate the probe 360° before each new
reading to obtain “fresh” mucus on the probe. In this way,
accurate and consistent results can be obtained each time.
Hold the probe in your dog’s vagina for a while to let it
reach the bitch’s body temperature, which will ensure ac
-
curate and consistent results.
SECTION 7 | PROBE INSERTION METHOD
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