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Scientific Basis of Midwifery > Lactation > Flashcards

Flashcards in Lactation Deck (42)
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How long do prolactin levels stay high for if BF is delayed?

1 week


Describe the relationship between feeding frequency and milk output

Frequent feeding in early lactation stimulates faster increase in milk output due to development of more prolactin receptors in response to suckling


Describe the Prolactin Receptor Theory

- Receptor sites need to be activated
- Number of receptors per cell increases in early lactation, then remains constant
- People with small number of prolactin receptor sites may not produce enough milk
- Number of receptor sites switched on depends on prolactin levels


What are milk-secreting cells called?



Describe the bell curve distribution of prolactin receptor sites

- Small population have few prolactin receptor sites
- Small population have loads of prolactin receptor sites
- Majority have an average number of prolactin receptor sites


Where is oxytocin produced?

Posterior pituitary gland


What is the milk ejection reflex?

Oxytocin acting on myoepithelial cells, causing them to contract


Describe the effects of oxytocin

- Role in the continuance of BF
- During suckling, released in discrete impulses
- Levels rise with a minute of stimulation, returning to baseline level within 6 minutes after feed finishes


What effect does oxytocin have on the mother's emotions?

- Has calming effect
- Perceived that stress levels are lower in mothers who BF
- Nipple sensation appears to have no influence to oxytocin levels
- Associated with 'love, labour and lactation'


What positive effects does skin to skin contact have?

- BF incidence at 1-3 months
- BF duration
- Maintenance of infant temp
- Infant blood glucose
- Infant crying


Explain the endocrine vs. autocrine action in breastfeeding

- The shift in lactation from hormonal control to being driven by milk removal
- BF not major factor in initiating lactation but is essential for continuation of lactation


Describe the Feedback Inhibitor of Lactation

- Autocrine feedback mechanism
- Locally controls milk synthesis
- Presence of FIL in milk inhibits milk synthesis - slows milk production when breast is full
- Protein accumulation exerts negative feedback control on continued milk production
- Demand and supply