2009
DOI: 10.1262/jrd.20113
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Fetal Age Estimation of Hokkaido Sika Deer (Cervus nippon yesoensis) Using Ultrasonography During Early Pregnancy

Abstract: Abstract. In sika deer, the normal method of estimating fetal age, based on fetal weight, is not applicable during the early pregnancy period. The objective of the present study was to describe the growth and development of sika deer fetuses and to establish a method for fetal age estimation during early pregnancy using ultrasonography. Five captive female Hokkaido sika deer (Cervus nippon yesoensis) were observed for estrus and mated (day 0) with an intact male. At two-or three-day intervals, fetuses were obs… Show more

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Cited by 6 publications
(9 citation statements)
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“…The most commonly used measurements include straight crown-rump length (SCRL), chest depth (CD), and head length (HL) 17 . While sufficient data has not yet been collected to develop reliable gestational age guidelines in Reeves’ muntjac deer, measurements may be collected in order to begin establishing these references.…”
Section: Protocolmentioning
confidence: 99%
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“…The most commonly used measurements include straight crown-rump length (SCRL), chest depth (CD), and head length (HL) 17 . While sufficient data has not yet been collected to develop reliable gestational age guidelines in Reeves’ muntjac deer, measurements may be collected in order to begin establishing these references.…”
Section: Protocolmentioning
confidence: 99%
“…While sufficient data has not yet been collected to develop reliable gestational age guidelines in Reeves’ muntjac deer, measurements may be collected in order to begin establishing these references. Fetal heart rate (FHR) has been shown in other species of cervid and ruminant to increase linearly as gestation progresses to a certain point (typically around day 60 of gestation), at which time the heart rate begins to decrease 17 . FHR may be used to estimate gestational age in conjunction with other ultrasound observations, however it is more commonly used as a measure of fetal viability 17,24 .…”
Section: Protocolmentioning
confidence: 99%
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