Impact of bariatric surgery on breastfeeding: a systematic review

Breastfeeding in metabolic and bariatric patients: a comprehensive guide for surgeons, patients, and the multidisciplinary team

Since nearly 40% of metabolic and bariatric surgery (MBS) patients are individuals with the ability to bear children, many may seek to become pregnant or may be currently lactating when seeking surgery. While many patients plan to breastfeed, MBS patients are at high risk for premature cessation of breastfeeding. Limited literature exists on the impact of MBS on lactation and there are no established guidelines to help clinicians support and educate MBS patients about breastfeeding. Herein, we aim to fill that gap by providing a comprehensive guide for bariatric surgeons, obstetricians, women's health providers, lactation consultants, registered dietitians, bariatric nurse coordinators, and advanced practice providers to support breastfeeding in patients with a history of MBS or who are considering MBS. We review physician-patient discussion points on how MBS impacts lactation, the micronutrient and caloric needs for this unique population, and data to support successful breastfeeding in post-MBS patients who are lactating regarding practical, anesthetic, and imaging considerations.

Pregnancy After Metabolic Bariatric Surgery: Risks and Rewards for Mother and Child

As the prevalence of obesity increases worldwide, and lifestyle modification or pharmaceutical treatment yields insufficient results for patients with severe obesity, an increasing number of patients opt for metabolic bariatric surgery as an effective and durable treatment of this disease. Seeing as 80% of these patients are women, many of whom are of reproductive age, pregnancies after metabolic bariatric surgery become increasingly common. Metabolic bariatric surgery has many benefits for overall health and pregnancy outcomes, but certain risks are also reported. This leads to the rise of a new population of patients with their own specific needs regarding follow-up. This review discusses the various benefits and risks of these types of surgery for pregnancy. We provide an overview of the current state of the evidence and look into future research goals.

A systematic review on clinical practice guidelines for managing pregnancy following metabolic-bariatric surgery

OBJECTIVE

The ongoing pandemic of obesity is associated with an increase of weight loss surgeries in women of reproductive age. This study was conducted to review clinical practice guidelines (CPGs) for managing pregnancy following metabolic-bariatric surgery.

METHODS

We conducted a comprehensive literature search of all CPGs that covered the management of pregnancy following metabolic-bariatric surgery, 2010 through 2022, and that were published in English. Two authors independently scored the quality and usefulness of CPGs using the Appraisal of Guidelines for Research and Evaluation II tool (AGREE II).

RESULTS

From a total of 20 CPGs, consistent recommendations included the following: 1) contraception with long-acting reversible contraceptives before surgery until the optimal time of pregnancy; 2) nutritional care by a dietitian; 3) considering gastrointestinal discomforts during pregnancy as a potential surgical complication; and 4) modified screening for gestational diabetes instead of glucose tolerance tests preventing post-bariatric hypoglycemia. There was a lack of uniformity concerning surgery-to-conception interval and dose of supplements, as well as research gaps regarding the surgical type, mental health, delivery type, breastfeeding, neonatal care, and weight retention.

CONCLUSIONS

All recommendations for managing pregnancy after metabolic-bariatric surgery were deemed clinically useful. Although consistent recommendations should be implemented, inconsistencies should be the focus of research.

The Effect of Maternal Bariatric Surgery on Offspring Anthropometry: A Mixed Cohort

PURPOSE

Although bariatric surgery is associated with a decrease in obesity complications, it may affect the children's growth by a maternal nutritional deficiency. This study was conducted to assess the effect of maternal bariatric surgery on offspring anthropometry.

MATERIALS AND METHODS

In a mixed cohort, anthropometric status of children aged 5 years or less born to mothers with a history of bariatric surgery was compared with a control group consists of peers born to mothers with obesity but without bariatric surgery. Anthropometric indices including crude and quantile values for BMI, weight, height, and head circumference at birth and the first 5 years of life were measured. Then, the adjusted effect of maternal surgical history on anthropometric status was estimated by linear regression.

RESULTS

From a total of 56 children, 28 born to mothers with a history of bariatric surgery, and 28 born to mothers with obesity but without bariatric surgery. At birth, weight (2915 vs 3225 g) and BMI (11.72 vs 12.94 kg/m2) were lower in the group with maternal bariatric surgery than in the control group (P = 0.02 and P = 0.03, respectively), although after regression adjustment, there was only a significant difference between the two groups in height for age value in children less than 5 years old (B = 0.872, P-value = 0.001).

CONCLUSION

Bariatric surgery with decrease of weight indices at birth has a probable influence on growth and development in next years. Therefore, it is recommended further studies to identify unknown effect of types of preconception surgical procedures on childhood outcomes.

Breastfeeding and pre-pregnancy bariatric surgery: A scoping review

BACKGROUND

Bariatric surgery is a procedure for people with class II and III obesity who are unable to lose weight using traditional methods. The incidence rate of bariatric surgery in reproductive-age women is increasing rapidly, so the number of women who become pregnant after bariatric surgery is rising.

AIM

To collate and synthesise available literature regarding breastfeeding following bariatric surgery.

METHODS

This review was reported by the preferred reporting items for systematic reviews and meta-analysis extension for scoping reviews (PRISMA-Scr). The review included peer-reviewed research studies and research-based conference abstracts on breastfeeding outcomes in mothers who have undergone bariatric surgery before pregnancy. Health databases were searched from 1990 to December 2023. Included studies were analysed using a narrative synthesis.

FINDINGS

From 1506 abstracts, 16 papers were identified. Three themes emerged from the analysis: challenges in exclusive breastfeeding, nutritional composition in breast milk, and breastfeeding experience. There was a tendency for lower breastfeeding rates and shorter durations in mothers who had bariatric surgery. Most studies focussed on the nutritional composition of breast milk however these results were mixed. Only three articles were qualitative, and their findings showed that women wanted more information and support about breastfeeding following bariatric surgery.

DISCUSSION

Our review indicates breastfeeding challenges in post-bariatric surgery mothers and reduced breastfeeding rates. It is unclear whether bariatric surgery impacts the nutritional quality of breast milk due to inconsistent study outcomes.

CONCLUSION

Future research is essential, specifically on understanding the breastfeeding concerns and experiences of women who have undergone bariatric surgery.

Association Between Bariatric Surgery and Breastfeeding Outcomes in Women: a Retrospective Case-Control Study

BACKGROUND AND OBJECTIVE

Bariatric surgery (BS) has shown promise in enhancing exclusive breastfeeding practices among women with obesity. Nevertheless, there remains a dearth of research exploring the intricate relationship between BS and breastfeeding outcomes. This study aims to investigate the potential association between bariatric surgery and exclusive breastfeeding outcomes.

METHODS

Employing a retrospective case-control design, this study undertook a comprehensive comparison of women who had undergone BS and subsequently gave birth during the study period. By meticulously matching the control group (No-BS group) based on key preoperative variables such as body mass index, age, parity, and delivery year, a robust comparative analysis was established.

RESULTS

Participants in the BS group exhibited a significantly extended duration of exclusive breastfeeding in comparison to the No-BS group (p < 0.001). However, there were no noteworthy disparities observed in terms of breast milk production between the two groups (p > 0.05). Notably, an independent risk factor associated with diminished exclusive breastfeeding duration was identified: gastroesophageal reflux symptoms (p = 0.003).

CONCLUSION

This study furnishes valuable insights into the efficacy of bariatric surgery in extending the duration of exclusive breastfeeding among pregnant women grappling with obesity. Furthermore, our findings underscore the discernible impact of postoperative gastroesophageal reflux symptoms on the duration of exclusive breastfeeding.

The impact of maternal bariatric surgery on long-term health of offspring: a scoping review

While pregnancy post-bariatric surgery has become increasingly common, little is known about whether and how maternal bariatric surgery affects the next generation. This scoping review aimed to collate available evidence about the long-term health of offspring following maternal bariatric surgery. A literature search was conducted using three databases (PubMed, PsycINFO, EMBASE) to obtain relevant human and animal studies. A total of 26 studies were included: 17 were ancillary reports from five "primary" studies (three human, two animal studies) and the remaining nine were "independent" studies (eight human, one animal studies). The human studies adopted sibling-comparison, case-control, and single-group descriptive designs. Despite limited data and inconsistent results across studies, findings suggested that maternal bariatric surgery appeared to (1) modify epigenetics (especially genes involved in immune, glucose, and obesity regulation); (2) alter weight status (unclear direction of alteration); (3) impair cardiometabolic, immune, inflammatory, and appetite regulation markers (primarily based on animal studies); and (4) not affect the neurodevelopment in offspring. In conclusion, this review supports that maternal bariatric surgery has an effect on the health of offspring. However, the scarcity of studies and heterogenous findings highlight that more research is required to determine the scope and degree of such effects. IMPACT: There is evidence that bariatric surgery modifies epigenetics in offspring, especially genes involved in immune, glucose, and obesity regulation. Bariatric surgery appears to alter weight status in offspring, although the direction of alteration is unclear. There is preliminary evidence that bariatric surgery impairs offspring's cardiometabolic, immune, inflammatory, and appetite regulation markers. Therefore, extra care may be needed to ensure optimal growth in children born to mothers with previous bariatric surgery.

Nutritional Implications of Bariatric Surgery on Pregnancy Management-A Narrative Review of the Literature

One in three women of reproductive age is obese. The mainstay treatment for obesity is bariatric surgery, and the following weight reduction results in a decrease in pregnancy adverse effects, including gestational diabetes mellitus, pregnancy-induced hypertension, and macrosomia. However, nutritional and vitamin deficiencies due to changes in the gastrointestinal tract after bariatric surgery are associated with an increase in the risk of fetal growth retardation and small for gestational-age neonates. The purpose of this review was to analyze the available recent literature on the subject of the management of pregnancy after bariatric surgery. We searched for available articles from 2007 to 2023 and chose articles of the greatest scientific and clinical value. Micronutrient, vitamin, and protein supplementation is recommended in the prenatal period and throughout the pregnancy. It is advised that pregnant women with a history of bariatric surgery should be provided with regular specialist dietary care. There is still a lack of recommendations about the optimum gestational weight gain after different types of bariatric surgery and for patients of different metabolic statuses. Women of reproductive age undergoing bariatric procedures should be provided with appropriate counseling about adequate contraception, the recommended time-to-conception interval, and the positive and negative influence of bariatric surgery on perinatal outcomes.

Breastfeeding following bariatric surgery among obese women with and without diabetes mellitus

BACKGROUND

Information on exclusive breastfeeding (BF) and BF initiation following bariatric surgery (BS) among obese women with diabetes mellitus (DM) and without DM (non-DM) is limited.

METHODS

Retrospective cohort study. Obesity was defined by BMI (kg/m2) as grade 1 (30-34.9), grade 2 (35-39.9) or grade 3 (≥40). The 65 women in the DM group (40 women with gestational, 19 with Type 2 and 6 with Type 1) was similar to 84 with non-DM in BS type: Roux-en-Y (51 vs 55%), sleeve gastrectomy (32 vs 35%), laparoscopic gastric banding (17 vs 7%) and gastro-duodenal anastomosis (0 vs 4%).

RESULTS

Women with DM were older (35 vs 33y), of advanced age (54 vs 27%), with higher prevalence of grade 3 obesity (66 vs 46%), chronic hypertension (31 vs 10%), delivery of late-preterm infants (23 vs 10%) and neonatal hypoglycemia (25 vs 12%). Although infant feeding intention was similar: BF (66 vs 79%), partial BF (9 vs 7%) or formula (25 vs 14%), at discharge women with DM had lower exclusive BF (29 vs 41%) and BF initiation rates (68 vs 76%) than those with non-DM. Women with grade 3 obesity (52% were DM) differed from those with grades 1-2 (34% were DM) in exclusive BF (27 vs 52%), and BF initiation rates (66 vs 86%).

CONCLUSION

After BS, women with DM, especially those with grade 3 obesity, had higher rates of chronic hypertension and preeclampsia and lower rates of exclusive BF and BF initiation than those who had DM but had less severe obesity.

Pregnancy and post-partum outcomes of obese women after bariatric surgery: A case-control study

INTRODUCTION

Bariatric surgery (BS) is known to reduce several obesity-related complications during pregnancy, but there is concern that it may increase the risk of maternal-fetal morbidity because of the malabsorption. This study aimed to investigate the impact of restrictive BS on several pregnancy outcomes in comparison with different grades of obesity.

MATERIALS AND METHODS

A single-center retrospective case-control study. All primiparous singleton pregnant women who underwent BS between the previous 1-5 years or with body mass index (BMI) ≥ 30 kg/m² delivering in our center were included. Obstetric and perinatal outcomes were analyzed and compared between the two groups.

RESULTS

Overall, 90 women were included: 30 underwent BS and 60 were obese. The mean pre-pregnancy BMI was 31.0 ± 4.2 kg/m² in the BS group and 38.1 ± 4.3 kg/m² in the control group (p < 0.001). The obese group experienced higher rate of fetal macrosomia (25% vs 6.7%; p = 0.049), gestational hypertension (23.3% vs 3.3%; p = 0.04), preeclampsia (23.3% vs 0%; p = 0.04), gestational diabetes (33.3% vs 6.7%; p = 0.01), and cesarean section (68.3% vs 20%; p < 0.0001). The BS group showed higher frequency of small for gestational age (SGA) (46.7% vs 18.3%; p = 0.006), late preterm delivery (PTD) (33.3% vs 10%; p = 0.009), cholestasis (13.3% vs 1.7%; p = 0.049). Breastfeeding ≥ 6 months was higher among BS mothers (36.7% vs 11.7%; p = 0.007).

CONCLUSIONS

Our findings support the positive impact of BS on several obstetric outcomes, at the expense of a higher frequency of SGA and PTD. BS mothers more frequently achieved the recommended goal of breastfeeding for 6 months compared to obese women.