Difference between revisions of "Camelid Pregnancy Diagnosis - Anatomy & Physiology"
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|linktext =Reproductive System | |linktext =Reproductive System | ||
|maplink = Reproductive System (Content Map) - Anatomy & Physiology | |maplink = Reproductive System (Content Map) - Anatomy & Physiology | ||
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|sublink1=Reproductive System - Anatomy & Physiology#Camelids_.28LLamas_.26_Alpacas.29 | |sublink1=Reproductive System - Anatomy & Physiology#Camelids_.28LLamas_.26_Alpacas.29 | ||
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* 80-90% accurat if used at ~10 weeks. | * 80-90% accurat if used at ~10 weeks. | ||
* Becomes more difficult as the foetus enlarges and slides down into the abdomen. | * Becomes more difficult as the foetus enlarges and slides down into the abdomen. | ||
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Revision as of 11:53, 22 August 2010
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Rejection Behaviour
- Rejection of the male usually indicates that conception may have taken place.
- Not very reliable, since a persistent corpus luteum will also cause rejection.
- A persistent corpus luteum may cause continued rejection by a non-pregnant female.
Ultrasound Scanning
Ultrasound scanning is the most reliable method of diagnosing pregnancy and can be highly accurate. However, ~10% of established pregnancies fail, so a positive scan will not guarantee live cria.
- Possible only a few days after conception.
- For early scans, a rectal probe must be used.
- Rarely practiced because the procedure causes much stress to the female, which is undesirable if she is pregnant.
- More commonly scanned using a transabdominal probe from ~28 days onwards.
Blood Testing
- Blood tests to measure progesterone concentration.
- Level of progesterone required to maintain pregnancy varies.
- Cria have been born to dams with very low plasma progesterone concentrations.
- Variability makes blood tests unreliable.
Rectal Examination
- Manual palpation of the uterus through the rectal wall.
- Impractical for smaller females.
- Will cause undesirable stress to the female.
Foetal Heartbeat
- Specialist listening devices such as 'Sonicaid' can detect a foetal heartbeat from ~10 weeks of gestation.
- 80-90% accurat if used at ~10 weeks.
- Becomes more difficult as the foetus enlarges and slides down into the abdomen.