Milk Ejection Reflex

Definition

The milk ejection reflex, also known as the let-down reflex, is a physiological response that occurs during breastfeeding or breast pumping. It is the mechanism by which milk is released from the breast alveoli and made available for the infant to feed.

5 Must Know Facts For Your Next Test

1. The milk ejection reflex is initiated by the sucking stimulus from the infant or the mechanical stimulation of the nipple during breast pumping.
2. Oxytocin release causes the myoepithelial cells surrounding the alveoli to contract, pushing the milk out of the alveoli and into the milk ducts.
3. The milk ejection reflex can be influenced by both physical and psychological factors, such as the sight, sound, or thought of the baby.
4. Disruption of the milk ejection reflex can lead to difficulties with breastfeeding, such as poor milk flow or delayed let-down.
5. Proper latch and positioning of the infant during breastfeeding can help facilitate the milk ejection reflex and ensure efficient milk transfer.

Review Questions

• Explain the role of the milk ejection reflex in the breastfeeding process.
  • The milk ejection reflex is a crucial component of breastfeeding, as it facilitates the release of milk from the breast alveoli and allows the infant to access the available milk. This reflex is triggered by the sucking stimulus from the infant, which stimulates the release of oxytocin. Oxytocin then causes the myoepithelial cells surrounding the alveoli to contract, pushing the milk out of the alveoli and into the milk ducts, where it can be accessed by the infant during feeding.
• Describe the physiological mechanisms underlying the milk ejection reflex.
  • The milk ejection reflex is initiated by the release of oxytocin from the posterior pituitary gland. This hormone acts on the myoepithelial cells surrounding the breast alveoli, causing them to contract and push the milk out of the alveoli and into the milk ducts. The release of oxytocin is triggered by the sucking stimulus from the infant or the mechanical stimulation of the nipple during breast pumping. Additionally, the milk ejection reflex can be influenced by various physical and psychological factors, such as the sight, sound, or thought of the baby, which can either facilitate or disrupt the reflex.
• Analyze the potential consequences of a disrupted milk ejection reflex and discuss strategies to promote an effective milk ejection reflex during breastfeeding.
  • A disrupted milk ejection reflex can lead to various difficulties with breastfeeding, such as poor milk flow, delayed let-down, and reduced milk transfer to the infant. This can impact the infant's ability to receive adequate nutrition and may contribute to issues like poor weight gain or dehydration. To promote an effective milk ejection reflex, it is important to ensure proper latch and positioning of the infant during breastfeeding, as this can help facilitate the sucking stimulus that triggers the reflex. Additionally, relaxation techniques, skin-to-skin contact, and the use of warm compresses on the breast can help stimulate the release of oxytocin and enhance the milk ejection reflex. Addressing any underlying factors, such as stress or anxiety, that may disrupt the reflex can also be beneficial in maintaining an effective milk ejection during breastfeeding.

Related terms

Alveoli:

The small, grape-like sacs within the breast where milk is produced and stored.

Oxytocin:

The hormone responsible for triggering the milk ejection reflex, released from the posterior pituitary gland.

Prolactin:

The hormone that stimulates milk production in the alveoli, released from the anterior pituitary gland.