Kita I, Eguchi M, Takatsuki S, Koizumi T, Tsubota T
Department of Theriogenology, Gifu University, Japan.
J Vet Med Sci. 1995 Dec;57(6):1029-33. doi: 10.1292/jvms.57.1029.
Corpora lutea of the sika deer (Cervus nippon, Cervidae) were histologically examined in order to elucidate their retrograding processes after parturition. They showed a remarkable regression within one month as luteal cells decreased in number and, by nine months after parturition, turned into masses of blood vessels containing many arterioles with a diameter of 30 microns or less. In retrograde corpora lutea (RCL), older than 1.5 years after parturition, arterioles of these dimensions decreased markedly, while those measuring 50 microns or more became dominant. These findings indicate that an examination of RCL can distinguish females less than nine months after parturition from those more than 1.5 years after parturition. Based on the findings of RCL from the ovaries of a 10.5-year-old female, it is suggested that RCL remain in the ovaries for at least 8.5 years after parturition. It was, however, difficult to distinguish RCL of pregnancy from retrograde accessory corpora lutea (RACL). In order to arrive at a complete count of RCL, the ovaries should be examined at thicknesses of 0.5 mm. To check the presence/absence of RCL of pregnancy within nine months or less after parturition, sectioning at thicknesses of 2 mm is sufficient.
为了阐明梅花鹿（鹿科，日本梅花鹿）产后黄体的退化过程，对其黄体进行了组织学检查。在一个月内，随着黄体细胞数量减少，黄体出现显著退化，并且在产后九个月时，变成了含有许多直径为30微米或更小的小动脉的血管团。在产后超过1.5年的退化黄体（RCL）中，这些尺寸的小动脉显著减少，而直径50微米或更大的小动脉则占主导地位。这些发现表明，对RCL的检查可以区分产后不到九个月的雌性和产后超过1.5年的雌性。根据一只10.5岁雌性卵巢中RCL的研究结果，表明产后RCL在卵巢中至少保留8.5年。然而，很难区分妊娠黄体和逆行副黄体（RACL）。为了准确计数RCL，卵巢应以0.5毫米的厚度进行检查。为了检查产后九个月或更短时间内妊娠RCL的存在与否，2毫米的切片厚度就足够了。
