摘要
Serial ultrasound examinations of the gravid uterus of a Jenny donkey (Equus asinus) carrying a transferred extraspecies horse (Equus caballus) conceptus between 11 and 33 days of gestation demonstrated that the embryo died before Day 33 even though the conceptus persisted in the uterus and the horse chorionic girdle invaded the maternal endometrium to form a circle of typically large horse endometrial cups in the right uterine horn. The high concentrations of horse CG secreted by these cups with its higher than usual ratio of FSH-like to LH-like biological activities of 1.4 compared to the 0.1 ratio of normal donkey CG hyper-stimulated the donkey’s ovaries to develop multiple large accessory follicles and resulting secondary corpora lutea which secreted high concentrations of progestagens that persisted in her bloodstream for the next 90 days. This case illustrated that, in all likelihood, girdle invasion can happen after the death of the embryo indicating autonomy of the chorionic girdle.
摘要译文
连续11至33天的jenny驴（equus asinus）的妊娠子妊娠子（Equus caballus）概念的串行超声检查表明胚胎在第33天之前死亡，即使概念仍然存在于子宫和马绒毛膜腰带侵入了母体子宫内膜，形成右侧子宫喇叭典型的大马子宫内膜杯的圆圈。这些杯子分泌的高浓度的马CG，其与常用比例为1.4的常规驴CG超刺激驴卵巢的0.1比与0.1比相比为1.4。结果次级Corpora Lutea在未来90天内分泌高浓度的孕级孕酮。这种情况说明，在所有可能性中，在胚胎死亡之后可能发生腰带侵袭，这表明绒毛膜的自治。
S. Wilsher[1];M. De Rijck[1];W. R. (Twink) Allen[1]. Post fetal death development of endometrial cups in a Jenny donkey (Equus asinus)[J]. Equine Veterinary Education, 2021,33(11): e416-e422