共查询到20条相似文献，搜索用时 22 毫秒
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Canine vaginal cytology during the estrous cycle 总被引：1，自引：0，他引：1
Post K 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(3):101-104
Changes which occur in vaginal cytology of the bitch during proestrus, estrus. metestrus and anestrus are correlated. The terms superficial cell index and karyopyknotic index are introduced and explained in order that they may be used to describe vaginal cytological changes and to assist in breeding programs. 相似文献
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采用S-P免疫组织化学法通过CD34抗体标记血管内皮细胞,测定绵羊发情周期的0、5、9、12、15d的卵巢内原始卵泡、初级卵泡、次级卵泡、近成熟卵泡、卵巢间质微血管的分布,并分析微血管密度（MVD）的变化规律,探讨绵羊发情周期不同时期各级卵泡微血管生成状态及卵泡微血管生成与卵泡发育的关系。结果表明,绵羊的原始卵泡周围无独立血管网,而初级卵泡的卵泡膜附近开始出现微血管,其MVD值为3.60±0.89,次级卵泡周围微血管密度值显著增高（P〈0.05）,MVD值为6.80±0.84。大窦腔卵泡0、5、9、12、15dMVD分别为15.80±0.84、23.00±2.30、22.40±2.41、21.20±2.28、34.80±2.39。0～5dMVD值显著升高（P〈0.05）,而5、9、12dMVD值差异均不显著（P〉0.05）,12～15dMVD值又明显升高（P〈0.05）。卵巢间质MVD值在各个发情周期各个时期差异均不显著（P〉0.05）。说明绵羊在发情周期内卵泡的血管新生是从初级卵泡开始的,并且卵巢的血管新生主要发生在卵泡上,而卵巢间质无血管新生现象。 相似文献
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Gross ovarian changes during estrous cycle of swine 总被引：2，自引：0，他引：2
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Control of the estrous cycle in the mare 总被引：1，自引：0，他引：1
R M Lofstedt 《Veterinary Clinics of North America: Equine Practice》1988,4(2):177-196
All current approaches to manipulating the reproductive biology of the nonpregnant mare are discussed. 相似文献
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Yabuki A Maeda M Suzuki S Matsumoto M Kurohmaru M Hayashi Y Taniguchi K Nishinakagawa H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2001,63(4):461-465
Although mice kidney morphology shows various sexual dimorphisms, the effect of the estrous cycle has not previously been discussed. In this study, we investigated the effects of the estrous cycle on kidney morphology, including renin-positive areas, of female DBA/2 mice. No effects were confirmed in most of the histometrical parameters, however, the percentage of the renal corpuscles in which cuboidal epithelium covered under 50% of the parietal layer was significantly higher during estrus compared to that during anestrus. 相似文献
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Medan MS Watanabe G Sasaki K Groome NP Sharawy S Taya K 《The Journal of reproduction and development》2005,51(4):455-463
Transrectal ultrasonography of ovaries was performed daily in 6 goats for 3 consecutive estrous cycles. Blood samples collected daily were measured for concentrations of FSH, inhibin A, and estradiol-17beta. Follicular and hormonal data were analyzed for associations between the follicular waves and hormonal concentrations. During the interovulatory intervals, follicular growth and regression occurred in a wave like pattern (2-5 waves), and the predominant patterns were three and four follicular waves. In addition, there was no significant difference among the diameters of dominant follicles during the growth phase of the follicular waves. The number of 3 mm follicles peaked on days 0, 7, and 11 in interovulatory intervals that had three follicular waves and on days -1, 5, 11, and 15 in those that had four follicular waves. Plasma concentrations of FSH increased around the day of follicular wave emergence and declined with the growth of follicles. Circulating FSH increased again concomitant with regression of dominant follicles in the anovulatory wave, whereas FSH levels remained low in the ovulatory wave. Inhibin A was negatively correlated with FSH, while it was positively correlated with estradiol-17beta, suggesting that inhibin A is a product of healthy growing follicles and that it contributes to the suppression of FSH secretion. In conclusion, the growth of ovarian follicles in goats exhibits a wave-like pattern, and follicular dominance is less apparent in goats. Moreover, inhibin A may be a key hormone for regulation of the follicular wave through suppression of FSH secretion in goats. 相似文献
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R A Pierson O J Ginther 《Journal of the American Veterinary Medical Association》1987,190(8):995-1001
The uteri of 22 Holstein heifers were monitored during 58 interovulatory intervals by transrectal ultrasonographic imaging. The ultrasonographic appearance of the uterus was influenced by the stage of the estrous cycle. Profound changes in characteristics visualized by ultrasonography included thickness of the uterine body, ultrasonographic evidence of edema, and accumulation of intravaginal and intrauterine fluids. Scores representing intravaginal fluid, intrauterine fluid, ultrasonographic texture, and number of gray-scale zones (comprising the image of the uterus) increased before ovulation, then decreased until approximately day 3 to day 6 (ovulation = day 0). The scores for uterine shape and number of cross sections of a uterine horn in one 5-MHz field began to increase before ovulation, reached a high plateau during the period associated with maximal progesterone production, and decreased before the time associated with estrus and ovulation. 相似文献
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Kaneko K Aoki H Furuichi T Hatori S Tanimoto H Kawakami S 《The Journal of reproduction and development》2004,50(3):361-367
To investigate how uterine inflammation affects ovarian activity in rats, endometritis was induced and changes in the length of estrous cycle and serum concentrations of estradiol-17beta (E(2)) and progesterone (P(4)) were examined. A suspension of Staphylococcus aureus (bacterial solution) or iodine solution was infused into the uterine lumen at various estrous phases. When the bacterial solution was infused at estrus, metestrus, or the first day of diestrus, the following diestrus continued for 5 to 12 days. In the case of the iodine solution, regardless of the estrous phase of the infusion, the following diestrus continued for approximately 6 days. E(2) concentration after infusion of each solution did not fluctuate largely and remained at a low concentration (around 5 pg/ml). P(4) concentration was high (35-45 ng/ml) on the day following infusion, but decreased rapidly to base line values within a few days and remained thereafter at a low level (around 5 ng/ml). It is assumed that the endometritis caused by biological or chemical stimulation raises the concentration of P(4) to depress gonadotrophic hormone secretion, and hence this high P(4) concentration might inhibit the growth of ovarian follicles. 相似文献
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