breastfeeding Flashcards
what glands do the breasts contain
mammary glands
what do mammary glands contain
clusters of alveoli that contain mammary secretory epithelial cells
what type of cells produce milk
mammary secretory epithelial cells
what ducts connect the alveoli, lobules and lobes
the lactiferous ducts
what is the function of the lactiferous duct
where milk is drained from the areola during lactation
what is the lactiferous sinus
where the milk is expelled from during breastfeeding
what hormones work together during breastfeeding
progesterone, oestrogen, human placental lactogen, prolactin
what does prolactin stimulate
milk production
what does oestrogen promote
the development of milk ducts - which are responsible for milk storage/ delivery
what does progesterone stimulate
alveolar-lobular formation - which is responsible ultimately for milk production
what changes can happen to the breast during pregnancy
- increase in size
- appearance of montgomery glands
- darkening of areola
- veins become more prominent
what are montgomery glands
small, raised bumps on the areola responsible for nipple lubrication and antibacterial properties
why do breasts increase in size typically in pregnancy
due to alveolar-lobular formation
what does progesterone trigger the production of during the second half of pregnancy
cholostrum - lactogenesis 1
why isn’t there significant lactation during pregnancy
levels of oestrogen and progesterone are high enough to prevent significant lactation
what stimulates the onset of lactogenesis 2
the delivery of the placenta which triggers a sudden drop in oestrogen and progesterone levels
what hormones are responsible for maintaining milk production and release
oxytocin and prolactin
what does nipple stimulation cause
a surge in oxytocin causing a milk ejection relflex and the movement of milk from alveoli into the milk ducts
what does the emptying of the alveoli enable
prolactin to active prolactin recepor sites on the walls of lactocytes triggering further milk production
what does breastmilk contain (16)
water
triglycerides
fatty acids
lactose
proteins
vitamins
calcium
phosphates
b = t lymphocytes
neutrophils
macrophages
stem cells
enzymes
hormones
growth factors
oligosaccharides
what does cholostrum contain
high concentration of immune components, sodium and chloride, but less lactose and triglycerides
what are the 3 stages of lactation
lactogenesis 1
lactogenesis 2
lactogenesis 3
what happens in lactogenesis 1
breast development and colostrum production
when does lactogenesis start
16/40