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What is Birth Alarm?
The Birth Alarm system consists of a transmitter, attached to an
antiroll girth, and a receiver unit. The transmitter/antiroll girth
is placed over the mare’s withers causing no discomfort and
is completely waterproof making it ideal for use during outdoor births.
The transmitter has range of 500 meters (1650 feet) which may be extended
through the use of a beeper or telephone dialer. The receiver runs
from mains power and may be placed in any desired location within
the transmitter’s range. A 12 volt adapter is available for
locations where mains power is unavailable.
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How does Birth Alarm work?
The Birth Alarm system has two different operating systems depending
upon the behavioral characteristics of the mare. In the late stages
of gestation it is not normal for a mare to lie completely on her
side when resting, this position is thus unique to the birth process.
Usually mares will rest in a half lying, sitting or even standing
position.
For this group of mares the Birth Alarm is operated on setting
4a.
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Approximately 15% of mares do rest in the totally lateral position
and thus form an exception to the rule. For these mares Birth Alarm
is equipped with a special function which enables detection and reporting
of the onset of delivery in all cases. For this the Birth Alarm is
operated on setting 4b.
Then over here explanation of operation of Birth Alarm.
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Operation on setting 4a:
For mares where lying completely on their side is unique to the birth
process. In order to gather and focus the strength for a contraction
the mare lies down in the totally lateral position. The transmitter
registers this position and the alarm is activated after 7.6 seconds.
Research has established that a contraction lasts a minimum of 7 seconds.
MARE DROPS TO HER KNEES >>
MARE LIES COMPLETELY OVER ON HER SIDE >> AFTER 7.6 SECONDS >>
THE ALARM SOUNDS
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Operation on setting 4b:
For mares which may lie completely over on their side in order to
rest. There are two situations which may arise
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Situation 1
MARE DROPS TO HER KNESS >> MARE LIES COMPLETELY
OVER ON HER SIDE >>
AFTER 3 MINUTES >> MARE IS STILL LYING ON HER SIDE AND THUS; IS
RESTING; NO ALARM.
Situation 2
MARE DROPS TO HER KNESS
>> MARE LIES COMPLETELY OVER ON HER SIDE (she is having a contraction)
>>
AFTER 2 MINUTES >> MARE ROLLS OFF HER SIDE (to a postion of less
than 70 degress) >> THE ALARM SOUNDS
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The mare lies down in the totally lateral position to rest. The alarm
will not activate although the receiver does indicate that the mare
is on her side and the transmitter is sending a signal. If the mare
is still lying in this position after three minutes the Birth Alarm
registers that the mare is resting and the system is neutralized.
Suppose after half an hour the mare gets up and then once again lies
down on her side. The Birth Alarm again registers the position for
a period of three minutes. The period of three minutes is not arbitrary.
Research has shown that a mare’s contraction never lasts longer
than 2.5 minutes. The Birth Alarm system is based on a period of 3
minutes – a safety margin of 0.5 minutes.
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