Abstract
The growing number of women who wish to have children with chronic diseases has resulted in a lack of knowledge regarding the management of the process during breastfeeding. The difficulties experienced by mothers with chronic diseases during the breastfeeding period have a negative impact on the success of breastfeeding. If healthcare personnel adopt a proactive approach and are equipped to manage breastfeeding issues, it will facilitate the achievement of breastfeeding goals by mothers with chronic diseases. The aim of this systematic review is to evaluate the current literature on breastfeeding issues, experiences, medication use, and management in mothers with chronic disease.
Introduction
Breast milk is a unique biofluid that contains all the nutrients necessary for the optimal growth and development of infants. The World Health Organization, UNICEF, and the American Academy of Pediatrics recommend initiating breastfeeding within the first hour after birth, exclusive breastfeeding for the first six months of life, and continuing breastfeeding for two years or longer (1, 2). A meta-analysis of 14 studies found that children who were breastfed for at least six months experienced a lower incidence of obesity, diabetes, asthma, sudden infant death syndrome, otitis media, lower respiratory tract illnesses, and gastrointestinal infections (3, 4). It is estimated that approximately 10-20% of pregnant women have one or more chronic diseases (5). Lack of information on medication use during pregnancy and postpartum leads women with chronic illnesses, such as lupus and polycystic ovary syndrome, to start formula feeding earlier and breastfeed for shorter periods (6). In this review, the management of breastfeeding in mothers with chronic diseases is discussed, focusing on the drugs and approaches that can be used during the relevant period.
Method
This review included original research articles (either observational or experimental), clinical guidelines, and systematic reviews published in English. The focus was on the breastfeeding experiences of mothers with chronic conditions. Case reports, conference abstracts and commentaries were excluded from the review. The term “breastfeeding” is defined as any method by which the infant consumes breast milk, including methods other than direct breastfeeding such as bottle-fed expressed breast milk. The search strategy was conducted using a keywords, including “chronic diseases”, “mother”, “breastfeeding”, “woman”, “diabetes mellitus”, “multiple sclerosis”, “myasthenia gravis”, “rheumatic diseases”, “bipolar disorder”, “attention deficit hyperactivity disorder”, “depression”, and “autism spectrum disorder”, across databases, including PubMed, Google Scholar, and Scopus. Furthermore, manual search strategies were employed including the scanning of reference lists and cited articles within each database. The search is limited to publications published between January 2014 and March 2024. The review included 36 original research articles, along with 25 systematic reviews, 2 meta-analysis reviews, and 3 guidelines (note: There is a numerical inconsistency in the original input; please verify for accuracy). Articles were extracted by one author and verified by a second, and discrepancies were resolved by discussion and consensus.
Diabetes
Diabetes is one of the most prevalent chronic diseases among pregnant women and mothers (7). Among women who were not previously diagnosed with diabetes, 6% developed gestational diabetes mellitus (GDM), which was first diagnosed during pregnancy and is characterised by glucose intolerance (8). GDM alters maternal metabolism, gut flora, and placental structure, leading to changes in breast milk composition, including immune factors, proteins, lipids, hormones, and nutrients (9). The colostrum of mothers with GDM has a higher concentration of human milk oligosaccharides, which promote growth, support intestinal microbiota balance, strengthen the immune system, and reduce infection rates (10). Some studies have found that women with GDM are generally less likely to initiate and continue breastfeeding than non-diabetic mothers (11). One-third of mothers with GDM experience delayed stage 2 lactogenesis due to obesity, insulin resistance, and inadequate support; this constitutes the most significant barrier to successful breastfeeding (12). However, recent studies comparing mothers with GDM who manage their condition through diet with those who use medication have shown no difference in breastfeeding rates at hospital discharge and three months postpartum (13). It is therefore important to provide support to these mothers from the pregnancy period onward in order to initiate and sustain breastfeeding (14). Infants of mothers with GDM are at an increased risk of complications, including hypoglycaemia, preeclampsia, preterm birth, fetal macrosomia, polyhydramnios, shoulder dystocia, caesarean delivery, neonatal respiratory distress, and delayed lactogenesis II. These complications frequently result in the separation of the mother-infant pair, leading to the initiation of formula supplementation and a reduction in breastfeeding duration. In such cases, it is recommended that mothers express and store breast milk during the final weeks of pregnancy for use postpartum (15). In the management of GDM, oral hypoglycaemic agents and insulin are employed to regulate glucose levels. Insulin, a large molecule that is not expected to pass into breast milk through diffusion, is considered to be compatible with breastfeeding. Glyburide is an oral hypoglycaemic agent used in the treatment of GDM and pregestational type 2 diabetes. It is a low-molecular-weight compound that is not expected to pass into breast milk through diffusion, rendering it compatible with breastfeeding. Nevertheless, infants should be monitored for hypoglycaemic symptoms (16). Metformin, which reduces insulin resistance, is considered safe during lactation. However, caution should be exercised in premature infants or infants with impaired kidney function (17).
Multiple Sclerosis
Multiple Sclerosis (MS) is an autoimmune inflammatory disease characterised by the formation of sclerotic plaques in the central nervous system, leading to neuronal demyelination and damage. Approximately two-thirds of all MS cases occur in women of childbearing age. Given that many women diagnosed with MS may still desire to have children at the time of diagnosis, it is crucial to engage in a proactive discussion of the impact of treatment options on pregnancy and breastfeeding. In general, there is a reduction in the risk of relapse during pregnancy in MS. However, an increase in the risk of relapse is observed following childbirth (18). The following medications were employed: interferon beta (IFN-B), glatiramer acetate, teriflunomide, dimethyl fumarate, fingolimod, cladribine, monoclonal antibodies (natalizumab, ofatumumab, ocrelizumab, and alemtuzumab), and disease-modifying antirheumatic drugs (DMARDs) such as rituximab. It has been demonstrated that breastfeeding protects against relapse in women with MS following childbirth (19). It is reported that the rate of postpartum relapse in breastfeeding women is 37% lower than in women who do not breastfeed or give both breast milk and formula after birth (20). The British Association of Neurology recommends encouraging breastfeeding of mothers with MS during the postpartum period. It was stated that if the disease relapses, methylprednisolone can be used, and breastfeeding can continue during this process. Among the medications used in MS treatment, glatiramer acetate, IFN-B, and natalizumab can be used during breastfeeding (21). Another study published in 2023 showed that ocrelizumab and ofatumumab are considered safe during breastfeeding and are present in very low concentrations in breast milk (22-24). Despite all of this, the available data on the use of monoclonal antibodies and DMARDs during pregnancy and breastfeeding is limited. Although the European Medicines Agency (EMA) asserts that IFN-B is safe during breastfeeding, the Food and Drug Administration has not provided reliable data for any medication (25). A case-by-case evaluation should be conducted. In conclusion, breastfeeding should be encouraged for mothers with MS, as it confers both physical and psychological benefits. Nevertheless, the potential effects of treatments administered during this process on the health of both the mother and the infant should be discussed with the family, and a joint decision should be made regarding the continuation of breastfeeding.
Myasthenia Gravis
Myasthenia Gravis (MG) is an autoimmune disease characterized by the formation of muscle antibodies against the acetylcholine receptor, MuSK, or LRP4 at the neuromuscular junction, resulting in weakness. Neonatal myasthenia occurs in 5-15% of babies born to mothers with MG. Weak sucking, swallowing difficulties, and hypotonia are observed in infants due to decreased muscle strength. The condition usually persists for several days or weeks before gradually improving lasting no more than three months. It is important to provide help and support regarding breastfeeding during this period (26). Many of the drugs used in the treatment of MG are compatible with breastfeeding. Pyridostigmine, low to moderate doses of corticosteroids, azathioprine, tacrolimus, cyclosporine, and their metabolites have very low concentrations in breast milk; therefore, they can be used during breastfeeding (27-30). Breastfeeding should be encouraged to mothers with MG (31). However, breastfeeding is not recommended for mothers with MG who use mycophenolate mofetil, methotrexate, and cyclophosphamide (32-34).
Rheumatic Diseases
Rheumatic Diseases (RDs), including systemic lupus erythematosus, inflammatory arthritis (rheumatoid, psoriatic, juvenile, spondyloarthropathies,), and other rare rheumatic diseases (vasculitis, scleroderma, and sarcoidosis), are frequently observed in women of reproductive age. The advent of more efficacious treatments for rheumatic diseases has enabled women to live longer and healthier lives, thereby enhancing their reproductive capacity (35).
A prospective study conducted in Norway involving women with lupus revealed that breastfeeding rates were 78% at 6 weeks postpartum, 54% at 6 months, and 30% at 12 months postpartum. The study observed that multiparous women breastfed for a longer duration than primiparous women, and that disease activity did not affect breastfeeding (36). Women with autoimmune RDs encounter difficulties in making informed decisions about infant feeding and long-term management due to a lack of information and support. Some women reported feeling pressured to breastfeed and expressed feelings of guilt when they were unable to breastfeed successfully or chose not to breastfeed. Consequently, it is imperative to implement targeted interventions to assist women with rheumatic diseases in their infant feeding decisions. These interventions should adopt a non-judgmental and person-centered approach, including the education of healthcare professionals (37). The 2023 guidelines published by the British Society for Rheumatology regarding the use of anti-rheumatic drugs during pregnancy and breastfeeding indicate that prednisolone, hydroxychloroquine, sulfasalazine, azathioprine, cyclosporine, tacrolimus, intravenous immunoglobulin, and anti-TNF drugs (infliximab, etanercept, adalimumab, certolizumab, and golimumab) are considered safe during breastfeeding. The safety of biological DMARDs (rituximab, IL-6 inhibitors, IL-1 inhibitors, abatacept, belimumab, IL-17 inhibitors, and IL-12/23 inhibitors) during breastfeeding is based on the limited evidence available (38).
Bipolar Disorder
The postpartum period represents a high-risk period for mothers with bipolar disorder, particularly during the initial month following delivery. This is due to an increased risk of developing psychosis (39). In a study published by the French Neuropsychopharmacology Society in 2023, mood stabilizers were classified using Hale’s system for the safety of antipsychotic drugs during breastfeeding. This classification was based on the potential for adverse effects on the infant, with the drugs classified as L2 (safer) and L4 (possibly hazardous) in the risk assessment categories. Mood stabilisers, including carbamazepine, lamotrigine, olanzapine, quetiapine, and risperidone which have been classified in the L2 group, have been the subject of limited studies in breastfeeding women. No evidence of adverse effects on breastfed infants has been reported in the literature (40-45). Studies concerning lithium and valproate, classified as L4, indicate a potential risk for breastfed infants. However, it is reported that breastfeeding can continue on a case-by-case basis, with the decision to continue breastfeeding (40, 46, 47). Lithium represents a first-line treatment option for postpartum psychosis. The excretion of lithium into breast milk and its concentration in the infant’s serum are highly variable. However, it has been observed that lithium does not accumulate in the infant despite being excreted into breast milk (48). It is recommended that lithium serum levels in infants, thyroid function tests, and blood urea and creatinine values be monitored on the second day and first week postpartum. Furthermore, clinical follow-up should be continued in the first and second months postpartum (48). The lithium dosage may increase during pregnancy, so the mother’s serum levels should be frequently monitored postpartum, and the dose adjusted to prevent excessive exposure to the baby through breast milk (49). Furthermore, it is important to monitor any changes in the infant’s movements, including hypotonia, restlessness, or feeding difficulties (50). In conclusion, given the relatively high exposure of breastfed infants to lithium and the limited short- and long-term safety data, lithium should be considered in situations where alternative treatments are not available (51). For mothers with bipolar disorder, insomnia has been demonstrated to increase the risk of manic episodes, while four hours of uninterrupted sleep has been shown to reduce this risk. Therefore, feeding can be continued with expressed breast milk provided by another adult in order to ensure that the infant remains nourished with breast milk (52). It is of great importance that mothers in this patient group are followed carefully when breastfeeding is stopped. It has been postulated that an increase in dopaminergic discharge resulting from a reduction in prolactin and oxytocin levels may be a contributing factor in the onset of manic episodes (8).
Depresif Disorders
Depressive symptoms are a common occurrence during the postpartum period, with an estimated prevalence of 7-20% among mothers (53). Mothers diagnosed with depression prior to pregnancy who continued breastfeeding until the third month postpartum exhibited a reduction in depressive symptoms (54). Furthermore, maternal depression has been demonstrated to have a detrimental impact on the infant’s microbiota. However, breastfeeding has also been shown to mitigate this effect (55). The French Neuropsychopharmacology Society has classified antidepressants that can be used during the postpartum period as L2 (safer) and L3 (moderately safe). Antidepressants classified as L2 included amitriptyline, citalopram, clomipramine, escitalopram, fluoxetine, paroxetine, sertraline, and venlafaxine. A limited number of studies have been conducted on breastfeeding women, and no evidence of adverse effects on breastfed infants has been found (40). Among the drugs classified as L3, bupropion, duloxetine, esketamine, milnacipran, mirtazapine, and vortioxetine have been reported to cause mild side effects during the breastfeeding period (40). At present, there is no medication in the L1 category widely used by breastfeeding women that has shown any evidence of adverse effects on infants. In conclusion, a complex relationship between breastfeeding and maternal depression indicates that supporting the mental health of mothers during the peripartum period would enhance the likelihood of successful breastfeeding.
Attention Deficit Hyperactivity Disorder
Attention Deficit Hyperactivity Disorder (ADHD) is a neurobehavioral disorder that affects 2-5% of adults. It has been documented that mothers with ADHD, due to their experiences of needing to focus their attention, may perceive breastfeeding as a challenging and complex process (56). It was demonstrated that the intention to breastfeed and the duration of breastfeeding were both negatively affected as a consequence (57). Dopaminergic, noradrenergic, and serotonergic drugs are employed to treat ADHD and are increasingly prescribed to women of childbearing age. The use of methylphenidate during breastfeeding is considered safe, as it is present at undetectable levels in breast milk, and no adverse effects on the infant have been reported (58). Nevertheless, amphetamine and clonidine are contraindicated during breastfeeding due to their high concentrations in breast milk, which can result in sleep disturbances, aggression, and seizures in breastfed infants (59). The use of atomoxetine, guanfacine, and modafinil during breastfeeding is not recommended due to a lack of data on their effects during this period (60, 61).
Autism Spectrum Disorder
Autism is a neurodevelopmental condition that typically begins in childhood and is characterised by difficulties in verbal and non-verbal communication, restricted and repetitive behaviours, and an altered perception of the world in terms of visual and sensory perception (62). A significant proportion of autistic mothers express a desire to breastfeed, yet breastfeeding rates are reported to be low due to a lack of adequate support from healthcare professionals and social networks, fatigue, disruption of routine, and sensory challenges such as intolerable sensations during breastfeeding, including “touch” and “pain” (63). In a study, it was stated that 10% of mothers with autism were uncomfortable with direct contact during the breastfeeding process; this led them to feed their babies with expressed milk. However, it has also been observed that when mothers receive breastfeeding support, their unpleasant feelings tend to decrease (64). On the other hand, it was found that some mothers with autism perceived the ritual of preparing formula milk as a source of peace of mind, which was the reason for their moderate approach to giving formula milk (65). Furthermore, healthcare professionals should be aware of the need to respect the privacy of autistic mothers and to obtain their permission before touching them. They should provide assistance to the mother without physical contact. Thus, continued collaboration between autistic mothers and healthcare professionals can ensure breastfeeding success (66).
Conclusion
The decision-making process of mothers with chronic diseases about breastfeeding is affected by many factors. It is necessary for these mothers to be informed about breastfeeding from the beginning of their pregnancy, to be provided with breastfeeding counseling after birth, and to have the mother-baby couple closely monitored. In this process, which is different for each mother, it will be effective for health professionals to know the risks that mothers with chronic diseases may experience, to support mothers’ self-confidence, and to be informed about the effects of the medications used on breastfeeding. In addition, pediatricians should cooperate with doctors managing the mothers’ chronic diseases to ensure that the health of both the mother and the baby is maintained during breastfeeding. Treatment plans for these mothers should be tailored and managed on an individual basis, taking into consideration the specific needs of each patient. As a result, since pediatricians play a critical role in managing the breastfeeding process of mothers with chronic diseases, their knowledge of this issue and their close monitoring of breastfeeding will positively affect the breastfeeding outcomes of mothers.