circRNA3669 promotes goat endometrial epithelial cells proliferation via miR-26a/RCN2 to activate PI3K/AKT-mTOR and MAPK pathways oleh Xiaorui Liu, Jiuzeng Cui, Mengyao Wei, Xiaofei Wang, Yuexia Liu, Zhongshi Zhu, Min Zhou, Gui Ba, Langda Suo, Yuxuan Song, Lei Zhang