Characterization of Ovarian Follicular Cysts and Associated Endocrine Profiles in Dairy Cows1

Hamilton, Stacey; Garverick, H.A.; Keisler, D.H.; Xu, Zhen-Zhong; Loos, K; Youngquist, R.S.; Salfen, B E

doi:10.1095/biolreprod53.4.890

Cited by 160 publications

(159 citation statements)

References 25 publications

Supporting

Mentioning

141

Contrasting

Unclassified

Order By: Relevance

“…Ultrasonography has proved to be useful in monitoring the dynamics of experimental ovarian cyst formation following the administration of steroids in heifers and cows [111][112][113][114]. Cyst turnover in spontaneous occurring ovarian cysts in cows [115] was also monitored.…”

Section: Ovarian Cystsmentioning

confidence: 99%

Bovine Reproductive Ultrasonography: A Review

Ribadu

Nakao

1999

Journal of Reproduction and Development

View full text Add to dashboard Cite

Abstract. The advent of ultrasonography over a decade ago has contributed tremendously in the field of bovine reproduction. Ultrasound imaging has shown that cattle exhibit 2 or 3 waves of follicular development during an estrous cycle. Ultrasonography allows monitoring of individual follicles as they grow and/or regress over time and patterns of follicular development can thus be determined with relative precision. Other important applications of ultrasonography in bovine reproduction includes; pregnancy diagnosis, fetal sex determination, folliculocenteses, diagnosis of abnormalities of the reproductive organs, monitoring of treatment of ovarian cysts, monitoring of postpartum genital resumption, ultrasound-guided centesis and male genital ultrasonography. Recent applications of ultrasonography in bovine reproduction includes doppler ultrasonography for genital blood flow and mammary ultrasonography. The use of ultrasonography is indispensable in most studies in which morphology (structure) and function are correlated. In this paper, the literature pertaining to the use of ultrasonography in bovine reproduction is reviewed. The applications and limitations of ultrasonography are highlighted. The non-invasive nature of ultrasonography makes it an excellent clinical and research tool in bovine reproduction.

show abstract

Section: Ovarian Cystsmentioning

confidence: 99%

Bovine Reproductive Ultrasonography: A Review

Ribadu

Nakao

1999

Journal of Reproduction and Development

View full text Add to dashboard Cite

show abstract

“…Cook et al [4] reported that steroid-induced follicular cysts in cattle were not static structures, but regressed to be replaced with other cystic structures. Furthermore, previous investigations [7,17] showed that spontaneously occurring ovarian cysts also exhibit a turnover of cysts, and suggested that the absence of a preovulatory surge of luteinizing hormone (LH) causes ovarian cysts [3,7,17].Approximately 20% of cows with ovarian cysts recover spontaneously within 30 days following diagnosis [1]. The turnover of cysts and associated changes of plasma gonadotropins and ovarian steroids in cows with spontaneously occurring ovarian cysts have been reported [17], but they have not been reported in cows which recovered from ovarian cysts or then relapsed into cysts.…”

mentioning

confidence: 92%

mentioning

confidence: 99%

“…The ovarian cysts in cattle were characterized by a process of turnover whereby when the original cysts regressed, new follicles developed into cysts on the same or the contralateral ovary [7,17]. It has been reported that approximately 20% of cows with ovarian cysts recover spontaneously within 30 days following diagnosis [1].…”

mentioning

confidence: 99%

“…Although Cook et al [3] and Hamilton et al [7] reported the absence of a preovulatory LH surge in cows with ovarian cysts, their twice daily sampling regimen was not frequent enough to characterize the intensity or timing of the preovulatory LH surge. In our previous study, we took blood samples at 3 hr intervals during the period when the follicles were growing from 10 to 25 mm in diameter, but no preovulatory LH surge was detected in the cows with ovarian cysts, at least during this developmental stage of the cysts [17].…”

mentioning

confidence: 99%

See 2 more Smart Citations

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

Yoshioka

Iwamura

Kamomae

1998

The Journal of Veterinary Medical Science

View full text Add to dashboard Cite

ABSTRACT. 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. -KEY WORDS: cattle, LH surge, ovarian cyst.J. Vet. Med. Sci. 60(2): 257-260, 1998 Follicular and luteal structures were examined by transrectal ultrasonography using a 5 MHz transducer and linear-array ultrasound scanner (SSD-280, Aloka, Tokyo, Japan) by the method previously described by Pierson and Ginther [13], and rectal palpation was performed to monitor ovarian changes. At each examination, follicles with a diameter exceeding 10 mm and the location of each structure were recorded on an ovarian map. Ultrasonic examination was made at 3 day intervals. When the cysts or corpora lutea regressed, however, and new follicular structures grew from 10 mm to more than 25 mm in diameter or to ovulation, examination was made daily for 2 series.Blood samples were collected by jugular venipuncture into heparinized vacutainers at 2 day intervals following the start of ultrasonic examination. An indwelling jugular cannula was used for sampling, when the ovaries were examined daily. All samples were collected between 8:00 and 9:30 hr. The samples were kept on ice and centrifuged at 1,500 g for 30 min at 4°C within 30 min. Plasma was collected and stored at 20°C until the concentrations of LH, follicle-stimulating hormone (FSH), progesterone and estradiol-17β were measured. Additional blood samples were collected via the jugular cannula into plain vacutainers at 3 hr intervals following the start of daily examinations of the ovaries to determine the presence of a preovulatory LH surge. After collection, the samples were kept for 6-18 hr at room temperature. Serum was separated by centrifugation and stored at 20°C until the concentrations of LH were measured.Plasma and serum concentrations of LH were measured by the homologous double-antibody radioimmunoassay (RIA) method described previously [8] using anti-bovine LH serum (i555/001, UCB-Bioproducts, Braine-l'Alleud, Belgium), bovine LH (i055, UCB-Bioproducts) for radioiodination, and LER-1716-2 (provided by Dr. L. E. Reichert, Albany Medical College) as a reference standard. Plasma concentrations of FSH were measured by RIA [2] using anti-bovi...

show abstract