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breast development and maturation

-begins during puberty
-differentiation into laborular structure
-no functional alveoli

pregnancy; breast development and maturation

stimulates growth and proliferation of duct system and formation of large lobules

synthesis and secretion of milk components (lactation)

-stimulated by prolactin
-stimulated by suckling

ejection of milk form the gland (lactation)

-release of milk into large glands
-stimulated by oxytocin
-stimulated by suckling or baby's cry


-produced during the first 2-3 days
-rich in protein, particularly IgA and minerals
-lower in CHO and fat

transitional milk

-produced between the 3rd and 6th day
-fairly high in protein
-lower in CHO and fat

mature milk

-established between the 10th day- 1st month
-lower in protein, higher in lactose and fat

foremilk (initial)

lower in fat, rich in other nutrients

hindmilk (later)

-higher in fat
-promotes satiety

milk volume lactation (first 6 months)

750 ml/day

milk volume lactation (second 6 months)

300-900 ml/day

milk volume lactation (second year)

200-600 ml/day

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