Fetal growth in muskoxen determined by transabdominal ultrasonography

A 5 MHz commercial sector scanner was used to monitor 13 muskox pregnancies and establish normal fetal growth curves. Examinations were carried out between 40 and 197 days of gestation and pregnancy could be detected throughout the period. Early pregnancies were found by scanning lateral to the udde...

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Bibliographic Details
Published in:Canadian journal of veterinary research 1994-07, Vol.58 (3), p.167-172
Main Authors: Pharr, J.W, Rowell, J.E, Flood, P.F
Format: Article
Language:English
Subjects:
Animals
body measurements
Embryonic and Fetal Development
Female
fetal development
gestation period
growth
Ovibos moschatus
Pregnancy
Ruminants - embryology
skull
ultrasonography
Ultrasonography, Prenatal - veterinary
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Summary:A 5 MHz commercial sector scanner was used to monitor 13 muskox pregnancies and establish normal fetal growth curves. Examinations were carried out between 40 and 197 days of gestation and pregnancy could be detected throughout the period. Early pregnancies were found by scanning lateral to the udder but as pregnancy progressed the fetus was found closer to the dam's umbilicus. Measurements of cranial and abdominal diameters taken at about two week intervals in seven uncomplicated pregnancies in four cows were used to construct fetal growth curves. These can be reliably used in the reproductive management of muskoxen. In addition a series of regressions based on measurements of the fetuses of muskoxen killed in the Arctic are provided. These allow cranial and abdominal diameters to be related to fetal weight and crown-rump length.
ISSN:0830-9000