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The present histological study was conducted on mammary gland tissue of sixty Murrah buffaloes. The samples were categorized into three stages as lactating, nonlactating nonpregnant (involution stage) and nonlactating pregnant by ascertaining the stage of lactation, dry period and pregnancy period. Stroma was found to be comprised of interalveolar, interlobular and interlobar connective tissue. The amount of stromal tissue varied during different stages of lactation. In late pregnant and colostrum stage the interalveolar connective was minimum and alveoli were almost touching each other. The amount of stromal tissue increased from colostrum stage to ten months of lactation. It was maximum in nonlactating nonpregnant stage from one to two months (later stage of involution). Through stomal tissue blood and lymph vessels and nerve goes into the parenchymal tissue.