07/02/2025
More and more parents are choosing to begin expressing milk before their babies are delivered, typically around 36 or 37 weeks of pregnancy. However research into how often parents express milk prenatally, how much milk is collected, and what affect this may have on milk supply is not well known.
This small study followed parents who were expecting an infant with a known problems with major organs including the heart, and were going to need intensive care unit (ICU) support immediately after birth. Parents were not included in the study if they had known risk factors for low milk supply or if their babies were not going to be able to breastfeed for medical reasons.
Parents were asked to review hand expression techniques before starting to express at 37 weeks. They were asked to hand express both breasts for 5 minutes two times per day. Parents used an online milk log to track their milk expression sessions and volume of milk collected. A total of 25 parents started the study, with 19 completing the study.
Results:
~No serious side effects were reported, (3 participants reported cramping and/or breast soreness)
~The average gestational age at delivery was about 38 weeks
~Over half of participants did not sustain 2 sessions per day until they delivered(52.6%).
~Most participants did perform at least 5 minutes of prenatal milk expression per breast for each session,
~Most common time for expression was late morning and evening
~Most participants had a positive experience and agreed that prenatal milk expression is useful.
~Most participants were able to collect some measurable colostrum before they delivered(median 3.99 ml) which is less than previous studies.
Factors such as the stress related to the infant's expected medical needs after birth may have impacted overall milk volume. Though it is important to remember that colostrum has such important benefits for infants, that any amount of colostrum provided to any infant, especially infants with complex medical needs, is extremely important.
For more details see the study: https://pubmed.ncbi.nlm.nih.gov/39382990/