*'''Dry period''': the udder comproses ducts, contracted inactive acini and fat, the latter depends on the age of the animal. Damage during lactation tends to produce ductal epithelia hyperplasia with acinar necrosis or degeneration i.e. only ducts regenerate. The organ as a whole can undergo regeneration but only under hormonal control at the next pregnancy. | *'''Dry period''': the udder comproses ducts, contracted inactive acini and fat, the latter depends on the age of the animal. Damage during lactation tends to produce ductal epithelia hyperplasia with acinar necrosis or degeneration i.e. only ducts regenerate. The organ as a whole can undergo regeneration but only under hormonal control at the next pregnancy. |