Changes of Ovarian Structures, Plasma LH, FSH, Progesterone and Estradiol-17β in a Cow with Ovarian Cysts Showing Spontaneous Recovery and Relapse

Journal of Veterinary Medical Science

Shokichi IWAMURA¹  Koji YOSHIOKA¹  Hideo KAMOMAE² 

[1] National Institute of Animal Health;Laboratory of Veterinary Reproduction, Faculty of Agriculture, Tokyo University of Agriculture and Technology

关键词: cattle;    LH surge;    ovarian cyst;   

DOI  :  10.1292/jvms.60.257

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(18)Cited-By(13)In a cow diagnosed as having ovarian cysts, we observed changes in the ovarian structures by ultrasonography for 71 days and examined plasma concentrations of sex hormones. The cow had 2 regressing cysts at the start of this study and 3 new follicles subsequently developed into cysts. With regression of these cysts, 2 new follicles developed and ovulated spontaneously, followed by the formation of 2 corpora lutea. On the day prior to ovulation, a preovulatory luteinizing hormone (LH) surge was detected. With regression of the corpora lutea, a new follicle developed and underwent atresia. Meantime, another follicle developed and became a cyst without ovulation. No preovulatory LH surge was observed during the period from regression of the corpora lutea to cyst formation. The results indicate that absence of the preovulatory LH surge is associated with occurrence of ovarian cysts and this endocrine aberration is reversible.

【 授权许可】

Unknown