Kaulfuss K H, Uhlich K, Gille U
Institut für Tierzucht und Tierhaltung mit Tierklinik, Landwirtschaftliche Fakultät, Martin-Luther-Universität Halle-Wittenberg.
Dtsch Tierarztl Wochenschr. 1998 Apr;105(4):162-7.
The aim of this study was to determine the in vivo development of the placentome diameter during the pregnancy in sheep. 32 ewes of four different breeds were involved. After the first detection of the placentomes (28 day p. c.) the ewes were scanned by transrectal ultrasound (Aloka SSD 500, 5 MHz linear probe) in a standing position every second or third day until day 50 p. c. and after the every week until parturition. The maximum diameters of 10 placentomes were measured. The placentome diameter increased rapidly until the middle of the third pregnancy month followed by a slight decrease. Between the 110th day p. c. and the parturition the diameter was nearly constant, but 40% of the animals showed a second increase at this time. The placentome diameter could be a good mark to describe the function of the placenta in sheep but it is only stipulated fit for the diagnosis of the state of the pregnancy.
本研究的目的是确定绵羊妊娠期胎盘直径的体内发育情况。涉及4个不同品种的32只母羊。首次检测到胎盘（妊娠28天）后，母羊在站立姿势下每隔第二天或第三天通过经直肠超声（Aloka SSD 500，5MHz线性探头）进行扫描，直至妊娠50天，之后每周扫描一次直至分娩。测量10个胎盘的最大直径。胎盘直径在妊娠第三个月中旬前迅速增加，随后略有下降。在妊娠110天至分娩期间，直径几乎保持恒定，但此时40%的动物出现第二次增加。胎盘直径可能是描述绵羊胎盘功能的一个良好指标，但仅规定适用于妊娠状态的诊断。
