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Fetal Age Estimation of Hokkaido Sika Deer (Cervus nippon yesoensis) Using Ultrasonography During Early Pregnancy

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Title: Fetal Age Estimation of Hokkaido Sika Deer (Cervus nippon yesoensis) Using Ultrasonography During Early Pregnancy
Authors: Yanagawa, Yojiro Browse this author
Matsuura, Yukiko Browse this author →KAKEN DB
Suzuki, Masatsugu Browse this author →KAKEN DB
Saga, Shin-ichi Browse this author
Okuyama, Hideto Browse this author
Fukui, Daisuke Browse this author
Bandou, Gen Browse this author
Katagiri, Seiji Browse this author →KAKEN DB
Takahashi, Yoshiyuki Browse this author →KAKEN DB
Tsubota, Toshio Browse this author →KAKEN DB
Keywords: Fetal age estimation
Fetal development
Hokkaido sika deer (Cervus nippon yesoensis)
Ultrasonography
Issue Date: May-2009
Journal Title: Journal of Reproduction and Development
Volume: 55
Issue: 2
Start Page: 143
End Page: 148
Publisher DOI: 10.1262/jrd.20113
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 observed by rectal ultrasonographic scans until 59-61 days of gestation. The straight crown-rump length (SCRL), curved crown-rump length (CCRL), head length (HL), trunk depth (TD) and heart rate (HR) of the fetuses were measured. Linear regression equations were computed for each measurement together with fetal age. Analyses were conducted after transformation to a natural logarithm for SCRL and CCRL. All equations were significant (P<0.001), with SCRL becoming measurable earlier (day 20) than the others and yielding the best correlation (Days= -2.08+14.15 LnX: X=SCRL, Ln=natural logarithm). Therefore, we concluded that a precise estimation of fetal age in early gestation is best performed using SCRL measurements.
Type: article
URI: http://hdl.handle.net/2115/59490
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 栁川 洋二郎

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