Helmick K E, Citino S B
White Oak Conservation Center, 3823 Owens Road, Yulee, Florida 32097, USA.
J Zoo Wildl Med. 2001 Dec;32(4):503-8. doi: 10.1638/1042-7260(2001)032[0503:SROAEP]2.0.CO;2.
A full-term ectopic pregnancy was diagnosed in a multiparous, captive gerenuk (Litocranius walleri walleri) following prolonged gestation without parturition. Until 213 days of gestation, fetal viability was determined by transabdominal ultrasound of fetal heartbeat, physical palpation, and visual observations of fetal movements. Survey abdominal radiographs obtained at day 229 of gestation revealed a fully mineralized fetal skeleton in an inappropriate position for parturition. Surgical exploration revealed a full-term, nonviable, male calf contained within fetal membranes attached to the omentum. Histologic examination of the fetal membranes identified lesions compatible with placenta-cotyledon separation occurring prior to surgical removal. No congenital fetal abnormalities or infectious processes were identified. Visual observation of the reproductive tract at the time of surgery revealed no abnormalities or evidence of concurrent pregnancy.
在一只经产的圈养长颈羚（Litocranius walleri walleri）出现长时间妊娠未分娩后，诊断为足月异位妊娠。在妊娠213天之前，通过经腹超声检查胎儿心跳、体格触诊以及观察胎儿活动来确定胎儿的存活情况。妊娠第229天拍摄的腹部X线平片显示，胎儿骨骼完全矿化，但位置不适合分娩。手术探查发现，一个足月、已死亡的雄性胎儿位于附着于大网膜的胎膜内。对胎膜进行组织学检查，发现病变与手术切除前发生的胎盘 - 子叶分离相符。未发现先天性胎儿异常或感染性病变。手术时对生殖道进行目视检查，未发现异常或同时妊娠的迹象。
