Bretzlaff K N
Department of Large Animal Medicine and Surgery, College of Veterinary Medicine, Texas A&M University, College Station 77843-4475.
J Am Vet Med Assoc. 1993 Jul 1;203(1):122-5.
Hydrometra was diagnosed in 41 of 1,411 (2.9%) Rambouillet and crossbred Rambouillet-Booroola Merino range ewes that were being examined with ultrasonography for pregnancy. Most diagnoses of hydrometra (40 of 41) were made at a second examination of 581 of the 1,411 ewes 40 days after the first examination (6.9%). Some of the ewes had membranes or small placentomes evident in the uterine fluid, suggesting that there had been embryonic resorption. Of the 15 ewes with hydrometra that were examined ultrasonographically a third time after an additional 42 days, 14 had resolved the condition. The increased prevalence of hydrometra at the second examination suggested that the stress of the first examination may have been a factor. Ovine fetal loss has been documented via ultrasonography, but hydrometra has not been commonly observed. Hydrometra may have developed because of unique circumstances of this flock, or it may be a condition that goes largely undiagnosed because most ewes are not examined for pregnancy twice within a short period.
在1411只接受超声妊娠检查的朗布依埃母羊以及朗布依埃-波拉-美利奴杂交母羊中，有41只（2.9%）被诊断为子宫积水。大多数子宫积水病例（41例中的40例）是在对1411只母羊中的581只进行首次检查40天后的第二次检查时确诊的（6.9%）。一些母羊的子宫液中有胎膜或小胎盘，这表明存在胚胎吸收现象。在另外42天后对15只有子宫积水的母羊进行第三次超声检查时，其中14只的病情已得到缓解。第二次检查时子宫积水患病率的增加表明，首次检查的应激可能是一个因素。通过超声检查已记录到绵羊胎儿丢失情况，但子宫积水并不常见。子宫积水可能是由于这群羊的特殊情况而发生的，也可能是一种在很大程度上未被诊断出来的病症，因为大多数母羊不会在短时间内接受两次妊娠检查。
