NTDT305 Lecture Notes - Lecture 5: Mammary Gland, Trans Fat, Milk Substitute
16 Dec 2018
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Document Summary
Chapter six: nutrition during lactation: human milk is the best food for newborn infants for six months or longer. Functional units of the mammary gland: alveoli, secretory cells, myoepithelial cells, mammary gland development, usually complete within 12 to 18 months after menarche, stages of lactogenesis (human milk production) Lactogenesis ii: increased blood flow to breast; milk comes in . Lactogenesis iii: milk composition is stable: hormonal control of lactation, prolactin: hormone that promotes milk production, stimulated by suckling, oxytocin release: responsible for ejection of milk from the milk gland, stimulated by suckling or nipple stimulation. The letdown reflex: an infant suckling at the nipple usually causes letdown. Birth and early hormonal process of lactation: hormonal environment changes abruptly after delivery of baby, abrupt increase in oxytocin. Loss of placenta causes progesterone and estrogen levels to fall. Isotonic with maternal plasma: about 0. 65 kcal/ml, calories may vary with fat, protein, and carbohydrate composition, fewer calories than human milk substitute (hms)
