Histological structure of the atretic follicles in water buffalo ovaries
1988
Penprapa Yathaisong
Prearitral follicles, the primordial, primary, and some secondary follicles, had 2 distinctive features of atresia. There were contraction of follicles or disintegration of oval nucleus and follicular cells. The antral or preovulatory follicular atresia could be classified into three stages. Stage I atresia : few cyknotic nuclei of granulosa cells around the antrum and corona radiata, folding of theca and granulosa cells, chromatin granules formed a larger dot and distorted ovum. Stage II atresia : thinner and disorganization of granulosa cells, larger dots of chromatin granules, increasing of vacuoles in the cytoplasm of ovum. Stage III atresia : disappearance of the theca cells and granulosa cells or one cell layer lining the antrum otherwise by connective tissue which later filled up the space, replacing of fibroblasts in the cytoplasm and persistent of zona pellucida in the connective tissue.
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