Integrative Review of Antenatal Milk Expression and Mother-Infant Outcomes During the First 2 Weeks After Birth

A Longitudinal Observation of Antenatal Milk Expression in Mothers of Infants with Congenital Anomalies

Background: For mothers of infants with congenital anomalies, antenatal milk expression (AME), known as hand expression during late pregnancy, allows mothers to contribute to their newborn's care through colostrum collection. However, research is limited by self-report of AME adherence and colostrum volume. Objective: This study examined the ability of participants to adhere to a recommended protocol on AME for any removal and measurement of colostrum during late pregnancy. Materials and Methods: A prospective, longitudinal, observational design was used. Our recommended protocol involved hand expression of 5 minutes per breast for a total of 10 minutes for each AME session twice per 24 hours for any colostrum from 37 0/7 weeks gestation until birth. Women received AME education, completed milk logs, and attempted AME. The study team verified all colostrum volumes. Results: Nineteen women (10 nulliparous) participated, with 13 (68%) carrying infants with major organ system defects and 6 (32%) carrying infants with congenital heart defects. Most participants (52.6%) completed more than half but fewer than all AME sessions. Seven participants (36.8%) fully adhered, completing two AME sessions daily until hospital admission. Eighteen participants (94.7%) could remove milk (80-100% of the time). The 24-hour colostrum volume (median 0.35 mL, interquartile range [IQR] 0.065-0.845) and the total colostrum volume (median 3.99 mL, IQR 1.35-6.82) from AME varied. Conclusions: Among a small group of women of infants with congenital anomalies, adherence to a recommended protocol is feasible but varied by AME session frequency. Most women could collect colostrum for future infant feeding.

A brief history of antenatal colostrum expression, and where to from here

The practice of antenatal colostrum expression (ACE), or the extraction of colostrum from the breasts during pregnancy, has an interesting history and continues to evolve. This narrative review aims to describe how perception and practices of ACE have changed over time, summarise the evidence on ACE in maternal and infant care, and highlight areas for future research. The literature demonstrates that ACE is safe for low-risk women when done from around 36 weeks' gestation. Women should be reassured that the skill of hand expressing is a valuable tool post-birth, regardless of whether they are able to collect colostrum antenatally or not. The collection and storage of colostrum in pregnancy can help avoid formula use in hospital, which may have follow on effects immune function and other areas. Ideally, colostrum collected during pregnancy would be kept safely frozen during the hospital stay and only defrosted and used during the stay if medically indicated, with parents supported through that process. Although ACE does not appear to improve long-term breastfeeding rates at present, it can increase confidence around breastfeeding. Further research in more diverse population groups, long-term breastfeeding and long-term health outcomes of using frozen antenatally expressed colostrum for babies (as compared to formula or fresh colostrum) would be valuable to gain a better understanding of the importance of ACE in maternity care.

Academy of Breastfeeding Medicine Clinical Protocol #19: Breastfeeding Promotion in the Prenatal Period (Revised 2024)

Background: The Academy of Breastfeeding Medicine revised the 2015 version of this clinical protocol to review the evidence and provide recommendations related to breastfeeding promotion in the prenatal period. Key Information: Promoting and normalizing breastfeeding in the prenatal period can improve breastfeeding outcomes including initiation and duration of breastfeeding. Ideally, prenatal interventions should be a part of a comprehensive longitudinal breastfeeding support program. Recommendations: Clinicians or other health workers should discuss breastfeeding at each prenatal visit. Counseling topics should include the health benefits of breastfeeding versus not breastfeeding, the basics of breastfeeding (e.g., physiology, positioning), what to expect of hospital-based and immediate postpartum breastfeeding support (i.e., Baby-Friendly Ten Steps), and the risks of unnecessary supplementation. Medical, anatomical, and other risk factors for breastfeeding challenges should be identified, and targeted anticipatory guidance should be given. Prenatal counseling should include distribution of structured breastfeeding education at low literacy levels and in the parent's preferred language. Counseling should be culturally sensitive and patient-centered, including family members when appropriate. Prenatal support may integrate various health workers (e.g., medical doctors, midwives, community health workers, lactation consultants, among others) and include various modalities including telecommunication. Enhancing breastfeeding education for prenatal care providers is also imperative. Additional themes related to implementation of recommendations for specific populations are also reviewed.

Breastfeeding and Antepartum Breast Milk Expression (BABE): A Randomized Control Trial Utilizing an Electric Breast Pump and its Effect on Postpartum Breastfeeding

Objective: To evaluate the effect of antenatal breast milk expression (ABE) on exclusive breastfeeding. Materials and Methods: A randomized control study was performed with the primary outcome being formula use during the postpartum hospital stay. Secondary outcomes were the exclusive breastfeeding rate at 6 months postpartum and peripartum safety outcomes. Participants included multiparous and nulliparous patients who planned to breastfeed. Exclusion criteria included exclusively breastfeeding in prior pregnancies for greater than 6 months, medical contraindications for breastfeeding, multiple gestation, history of preterm delivery, or any contraindication to vaginal delivery. ABE group participants were instructed to pump for 20 minutes, three times daily, starting at 37 weeks of gestation. Results: Three-hundred four participants from two clinics were enrolled. There was no significant difference in formula use during hospital admission (odds ratio [OR] 0.64, 95% confidence interval [CI] 0.34-1.22) or in exclusive breastfeeding at 6 months postpartum (OR 0.66, 95% CI 0.34-1.29). Colostrum use was more prevalent in the ABE group (OR 5.31, 95% CI 2.63-10.76). ABE participants were more likely to present in spontaneous labor (OR 2.09, 95% CI 1.05-4.14). Conclusion: ABE did not significantly improve exclusive breastfeeding rates, but safely provides women opportunities to become familiar with breastfeeding before delivery and can provide readily available colostrum. There was no negative secondary safety outcome related to ABE identified. Prenatal care providers can consider recommending ABE to patients with minimal to no experience with breastfeeding.

Effect of antenatal milk expression education on lactation outcomes in birthing people with pre-pregnancy body mass index ≥25: protocol for a randomized, controlled trial

BACKGROUND

Birthing people with pre-pregnancy body mass indices (BMIs) ≥ 25 kg/m², particularly those without prior breastfeeding experience, are at increased risk for suboptimal lactation outcomes. Antenatal milk expression (AME) may be one way to counteract the negative effects of early infant formula supplementation common in this population.

METHODS

This ongoing, randomized controlled trial in the United States evaluates the efficacy of a telelactation-delivered AME education intervention versus an attention control condition on lactation outcomes to 1 year postpartum among 280 nulliparous-to-primiparous, non-diabetic birthing people with pre-pregnancy BMI ≥ 25 kg/m². The assigned study treatment is delivered via four weekly online video consultations between gestational weeks 37-40. Participants assigned to AME meet with study personnel and a lactation consultant to learn and practice AME. Instructions are provided for home practice of AME between study visits. Control group participants view videos on infant care/development at study visits. Participants complete emailed surveys at enrollment (34^0/7-36^6/7 gestational weeks) and 2 weeks, 6 weeks, 12 weeks, 6 months, and 12 months postpartum. Surveys assess lactation and infant feeding practices; breastfeeding self-efficacy, attitudes, and satisfaction; perception of insufficient milk; onset of lactogenesis-II; lactation support and problems; and reasons for breastfeeding cessation. Surveys also assess factors associated with lactation outcomes, including demographic characteristics, health problems, birth trauma, racial discrimination, and weight stigma. Health information and infant feeding data are abstracted from the pregnancy and birth center electronic health record. Milk samples are collected from the intervention group at each study visit and from both groups at each postpartum follow-up for future analyses. Qualitative interviews are conducted at 6 weeks postpartum to understand AME experiences. Primary outcomes of interest are breastfeeding exclusivity and breastfeeding self-efficacy scores at 2 weeks postpartum. Outcomes will be examined longitudinally with generalized linear mixed-effects modeling.

DISCUSSION

This is the first adequately powered trial evaluating the effectiveness of AME among U.S. birthing people and within a non-diabetic population with pre-pregnancy BMI ≥ 25 kg/m². This study will also provide the first evidence of acceptability and effectiveness of telelactation-delivered AME.

TRIAL REGISTRATION

ClinicalTrials.gov: NCT04258709.