Modern, exogenous exposures associated with altered mammary gland development: A systematic review

Mother's Emotional Experiences of Breastfeeding with Primary Low Milk Supply in the First Four Months Postpartum: An Interpretative Phenomenological Analysis

Background: Primary low milk supply (PLMS) prevents mothers from producing sufficient milk to breastfeed exclusively. However, limited evidence exists regarding women's experiences of breastfeeding with PLMS. Objective: This article aims to investigate the emotional experiences of mothers breastfeeding with PLMS in the first 3 months postpartum. Materials and Methods: The study was conducted in Ireland and used a phenomenological methodology to investigate the lived experiences of breastfeeding mothers with PLMS. Nine first-time breastfeeding mothers with PLMS participated, and data collection took the form of unstructured interviews. Data analysis was completed using Interpretative Phenomenological Analysis. Results: Being in the Whirlwind is one of four superordinate themes identified in this study. This theme relates to participants' internalized experiences of breastfeeding with PLMS in the first 3 months postpartum. During this time, participants struggled to come to terms with having PLMS and became caught up in all-consuming efforts to increase their milk supply. They experienced guilt, sadness, confusion, anger, and anxiety, with many describing the early months postpartum as traumatic. Participants revealed how triple-feeding (a regime of breastfeeding, pumping, and supplementing) negatively affected their mental health and reported that supplementing with infant formula was emotionally upsetting. Conclusions: Our findings reveal that the combination of PLMS and triple feeding can negatively impact a mothers' mental health. A greater understanding among health care professionals of the emotional impact of having PLMS and triple-feeding could enhance the provision of sensitive and person-centered support for those with PLMS. Antenatal breastfeeding education should acknowledge that PLMS is a challenge for a small cohort of women and place greater emphasis on the emotional aspects of breastfeeding challenges.

Breast hypoplasia markers among women who report insufficient milk production: A retrospective online survey

OBJECTIVES

To estimate the proportions of anatomical breast characteristics suggestive of breast hypoplasia among breastfeeding women self-reporting low milk supply. We also explored breast hypoplasia risk factors.

DESIGN

Online survey conducted between October 2021 and January 2022.

SETTING

Five low milk supply Facebook groups.

PARTICIPANTS

487 women reporting low milk supply with their first child born ≥ 37 weeks gestation within 5 years of participation in this study, and residing in the USA, Australia or the UK. We present data on the primary outcome ('breast type') for 399 women. Women were excluded if the dyad was separated for more than 24 hours during the hospital stay, or if the mother reported removing milk less than 6 times per day from each breast on most days before being aware of having insufficient milk production.

PRIMARY AND SECONDARY OUTCOME MEASURES

The proportions of proposed breast hypoplasia markers including atypical breast type, widely spaced breasts, breast asymmetry, stretch marks on the breast and lack of pregnancy breast growth. We also estimated the odds of having breast hypoplasia markers in at-risk groups compared to reference groups, adjusting for covariates.

RESULTS

Approximately 68% reported at least one atypical breast (270/399; 95% CI: 62.9%, 72.1%). Around 47% reported widely spaced breasts (212/449; 95% CI: 42.7%, 52.7%), 72% a lack of pregnancy breast growth (322/449; 95% CI: 68.3%, 77.4%), and 76% stretch marks on the breast (191/250; 95% CI: 70.7%, 81.3%). Multiple logistic regression analyses identified being overweight during pubertal years as a risk factor for atypical breast type and lack of pregnancy breast growth.

CONCLUSIONS

Participants in low milk supply Facebook groups reported high rates of breast hypoplasia markers. Being overweight during adolescence was a risk factor for breast hypoplasia markers. These findings should be confirmed in well-conducted large cohort studies to determine the strongest combination of hypoplasia markers in predicting low supply.

Obesity-derived alterations in the lactating mammary gland: Focus on prolactin

Obesity is a modern pandemic with negative consequences in women's reproductive health. Women with overweight and obesity can develop mammary gland alterations that unable exclusive breastfeeding. Obesity associates with a disturbed lactating mammary gland endocrine environment including a decreased action of the hormone prolactin (PRL), the master regulator of lactation. The PRL receptor and the action of PRL are reduced in the mammary gland of lactating rodents fed an obesogenic diet and are contributing factors to impaired lactation in obesity. Also, treatment with PRL improves milk yield in women with lactation insufficiency. This review focuses on the impact of diet-induced obesity in the lactating mammary gland and how obesity impairs the lactogenic action of PRL. Although obesity alters lactation performance in humans and rodents, the responsible mechanisms have been mainly addressed in rodents.

Impaired Lactation: Review of Delayed Lactogenesis and Insufficient Lactation

It is estimated that as many as 1 in 20 women worldwide are unable to successfully breastfeed or provide adequate nutrition for their infants through their breast milk alone. Compromised nutrition in the early stages of life places the infant at risk for insufficient growth as well as serious and potentially disabling or life-threatening complications. This review summarizes risk factors associated with impaired lactation that may result in either delayed lactogenesis or insufficient lactation. The risk factors for insufficient lactation are categorized into preglandular, glandular, and postglandular causes. Impaired lactation can occur despite maternal motivation, knowledge, support, and appropriate breastfeeding technique. Although there is no clear way to predict who will experience impaired lactation, knowledge about the risk factors can enable health care professionals to better identify at-risk mother-infant dyads. Early intervention may help prevent infant complications associated with inadequate nutritional intake.