Are Prolactin Levels Linked to Suction Pressure?

Area of Science:

• Reproductive Physiology
• Lactation Biology
• Infant Nutrition

Background:

• Suction pressure is a key driver of lactation, stimulating prolactin (PRL) secretion essential for milk production.
• The precise role of suction pressure in postnatal PRL secretion and milk supply remains unclear.

Purpose of the Study:

• To investigate the relationship between infant suction pressure, maternal PRL levels, and lactation outcomes in breastfeeding dyads.
• To understand how suction pressure influences the onset and perceived milk supply of lactation.

Main Methods:

• 117 mother-infant dyads were analyzed, measuring infant suction pressure and maternal serum PRL levels before and after breastfeeding.
• Maternal perception of lactation onset and milk supply was assessed using validated scales.
• Factors like gestational age, maternal BMI, infant birth weight, and formula use were recorded.

Main Results:

• Low suction pressure correlated with smaller PRL increments, while high suction pressure was linked to earlier perceived lactation onset.
• Low suction pressure, high formula frequency, and small PRL increments were associated with perceived insufficient milk supply.
• Shorter gestational age, higher maternal BMI, and higher infant birth weight were linked to smaller PRL increments.

Conclusions:

• Infant suction pressure directly correlates with postnatal PRL increments and influences the perceived timing of lactation onset.
• Effective infant sucking may enhance maternal confidence in lactation, contributing to breastfeeding success.
• Sucking duration, formula use, maternal BMI, and infant birth weight are additional factors in early breastfeeding.