Vlčková Radoslava, Sopková Drahomíra, Pošivák Ján, Valocký Igor
Department of Normal Anatomy, Histology and Physiology, Institute of Physiology, University of Veterinary Medicine and Pharmacy in Košice, 041 81 Košice, Slovakia.
Vet Med Int. 2012;2012:638928. doi: 10.1155/2012/638928. Epub 2012 Apr 3.
The distribution of healthy and atretic follicles on the ovarian surface of improved Valachian ewes 17, 24, and 32 days postpartum is reported in this study. The number of healthy follicles was higher on day 24 postpartum and their mean diameter tended to increase to day 32 (P < 0.05) with the greatest diameter of 5 mm. 78-81% of atretic follicles ≥3 mm in diameter was observed where apoptosis began in the follicular cells situated at the follicular cavity. The early atretic follicles are characterized by the presence of mitotic pictures. In one ewe 24 days postpartum, small regressive follicular cysts were observed. Contracting atresia is characterized by thickening of the theca interna even to 190 μm. Progesterone and oestradiol-17β concentrations were maintained at relatively low levels, but with no significant difference between the days postpartum.
本研究报告了改良瓦拉几亚母羊产后17天、24天和32天卵巢表面健康卵泡和闭锁卵泡的分布情况。产后第24天健康卵泡数量较多，到第32天其平均直径有增大趋势（P<0.05），最大直径为5毫米。观察到直径≥3毫米的闭锁卵泡中有78 - 81%在卵泡腔处的卵泡细胞开始出现凋亡。早期闭锁卵泡的特征是存在有丝分裂图像。在一只产后24天的母羊中，观察到了小的退行性卵泡囊肿。萎缩性闭锁的特征是卵泡内膜增厚，甚至可达190微米。孕酮和雌二醇-17β浓度维持在相对较低水平，但产后各天之间无显著差异。
