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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine >
Peer-reviewed Journal Articles, etc >
Fetal Age Estimation of Hokkaido Sika Deer (Cervus nippon yesoensis) Using Ultrasonography During Early Pregnancy
| 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)
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Submitter: 栁川 洋二郎
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