Histological Characteristics of the Endometrium and its Affecting Factors in Dairy Cattle (Bos taurus) on Embryo Transfer Day

Q4 Multidisciplinary Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. Pub Date : 2023-04-01 DOI:10.2478/prolas-2023-0017

I. Piginka-Vjaceslavova, O. Ponomarjova, Lāsma Lacberga, I. Sematovica, M. Zolovs, A. Vanaga

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Abstract

Abstract In cows embryo transfer occurs on the 7th day of the oestrous cycle. Embryo survival and successful pregnancy depend on many factors, including early interaction between embryo and endometrium. Therefore, the aim of our research was to describe histo-morphological characteristics of endometrium in donor and recipient cows on obtaining and transfer day, respectively (7th day of the oestrus cycle). In addition, progesterone and oestradiol levels, the ipsilateral and contralateral corpus luteum, animal age, lactation number and days postpartum were determined. The results of the study revealed a significant difference in endometrial gland cell size, vacuolisation of glandular epithelium cytoplasm, and stromal oedema in the donor and recipient cows. However, these parameters were related only to the level of progesterone in the blood, and no other investigated factors in this study.

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胚胎移植日奶牛子宫内膜组织学特征及其影响因素

奶牛胚胎移植发生在发情周期的第7天。胚胎存活和妊娠成功取决于许多因素，包括胚胎与子宫内膜的早期相互作用。因此，我们的研究目的是描述供体奶牛和受体奶牛在获得和移植当天(发情周期第7天)子宫内膜的组织形态学特征。测定黄体酮和雌二醇水平、同侧和对侧黄体、动物年龄、泌乳次数和产后天数。研究结果显示，供体奶牛和受体奶牛子宫内膜腺细胞大小、腺上皮细胞质空泡化和间质水肿有显著差异。然而，这些参数仅与血液中孕酮水平有关，本研究未对其他因素进行研究。

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