{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T06:31:07Z","timestamp":1783751467746,"version":"3.55.0"},"reference-count":89,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T00:00:00Z","timestamp":1776384000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Obesity in women of reproductive age is a major issue. It is associated with reduced fertility and an increased risk of obstetric and perinatal complications. Bariatric surgery is the most effective treatment for severe obesity, leading to substantial weight reduction, improvement of metabolic disorders, and enhanced fertility. Consequently, an increasing number of women are becoming pregnant after undergoing bariatric surgery. The aim of this paper is to review current recommendations and research data regarding the care of women after bariatric surgery in the periconceptional and perinatal periods, as well as throughout pregnancy, delivery, and the postpartum period. Research suggests that pregnancy after bariatric surgery is associated with a lower risk of gestational diabetes, hypertension, preeclampsia, and fetal macrosomia compared with pregnancies in women with similar baseline BMI (body mass index) who have not undergone surgical treatment. At the same time, an increased risk is observed for low birth weight, maternal micro- and macronutrient deficiencies, and complications characteristic of bariatric procedures, such as dumping syndrome or intra-abdominal hernias. Most scientific societies recommend postponing pregnancy planning for 12\u201318 months after surgery and using effective contraception, preferably methods that do not require gastrointestinal absorption. Regular monitoring of laboratory parameters, individually tailored supplementation, and interdisciplinary care are essential for the safe management of pregnancy after bariatric surgery. In particular, care should include achieving a stable body weight before conception, monitoring of nutritional status, verifying proper weight gain during pregnancy, and considering alternative methods for gestational diabetes screening (e.g., glycaemic monitoring instead of oral glucose tolerance testing) due to the risk of dumping syndrome. Appropriate preparation for pregnancy and proper management throughout its course allow for reducing the risk of perinatal complications. Bariatric surgery itself is not a contraindication to vaginal delivery.<\/jats:p>","DOI":"10.3390\/nu18081280","type":"journal-article","created":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T14:24:51Z","timestamp":1776435891000},"page":"1280","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Care of Patients After Bariatric Surgery in the Periconceptional and Perinatal Periods"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-0778-0175","authenticated-orcid":false,"given":"Karolina","family":"Skulimowska","sequence":"first","affiliation":[{"name":"Department of Endocrinology, Diabetology and Internal Medicine, Lower Silesian Specialist Hospital-Emergency Medicine Center, 54-049 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2850-7316","authenticated-orcid":false,"given":"Tomasz","family":"Tomkalski","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, Diabetology and Internal Medicine, Lower Silesian Specialist Hospital-Emergency Medicine Center, 54-049 Wroclaw, Poland"},{"name":"Faculty of Medicine, Wroclaw University of Science and Technology, 50-386 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6791-9976","authenticated-orcid":false,"given":"Agata","family":"G\u00f3ral","sequence":"additional","affiliation":[{"name":"University Clinical Hospital, 50-556 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-7086-7062","authenticated-orcid":false,"given":"Marek","family":"Murawski","sequence":"additional","affiliation":[{"name":"Clinical Department of Gynecological Surgery and Oncology, Wroclaw Medical University, 50-556 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,17]]},"reference":[{"key":"ref_1","unstructured":"(2025, September 14). Obesity and Overweight. World Health Organization. Available online: https:\/\/www.who.int\/news-room\/fact-sheets\/detail\/obesity-and-overweight."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1007\/s10995-010-0712-6","article-title":"Childbearing, stress and obesity disparities in women: A public health perspective","volume":"16","author":"Davis","year":"2012","journal-title":"Matern. Child Health J."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1511","DOI":"10.1007\/s11695-015-1721-8","article-title":"Female Sexual Function Before and After Bariatric Surgery: A Cross-Sectional Study and Review of Literature","volume":"25","author":"Janik","year":"2015","journal-title":"Obes. Surg."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Yang, S.T., Liu, C.H., Ma, S.H., Chang, W.H., Chen, Y.J., Lee, W.L., and Wang, P.H. (2022). Association between Pre-Pregnancy Overweightness\/Obesity and Pregnancy Outcomes in Women with Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis. Int. J. Environ. Res. Public Health, 19.","DOI":"10.3390\/ijerph19159094"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"595","DOI":"10.5603\/GP.2020.0162","article-title":"Is Weight Just a Number? Relationship between Overweight, Obesity and Domains of Sexual Functioning among Young Women","volume":"91","author":"Fuchs","year":"2020","journal-title":"Ginekol. Pol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"257","DOI":"10.1080\/14647273.2022.2045520","article-title":"Motherhood and Motivations for Bariatric Surgery\u2014A Qualitative Study","volume":"26","author":"Paul","year":"2023","journal-title":"Hum. Fertil."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1016\/j.ajog.2018.02.003","article-title":"Maternal and Neonatal Outcomes after Bariatric Surgery; a Systematic Review and Meta-Analysis: Do the Benefits Outweigh the Risks?","volume":"218","author":"Kwong","year":"2018","journal-title":"Am. J. Obstet. Gynecol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"991","DOI":"10.1007\/s11695-022-05895-3","article-title":"Pregnancy Complications in Women with Weight Loss Surgery Compared to a Non-Surgical Population of Women with Obesity","volume":"32","author":"Christopher","year":"2022","journal-title":"Obes. Surg."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1016\/j.ogc.2015.01.008","article-title":"Pregnancy Risks Associated with Obesity","volume":"42","author":"Mission","year":"2015","journal-title":"Obstet. Gynecol. Clin. N. Am."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1002\/bdra.20620","article-title":"Maternal Obesity and Morbid Obesity: The Risk for Birth Defects in the Offspring","volume":"88","author":"Blomberg","year":"2010","journal-title":"Birth Defects Res. A Clin. Mol. Teratol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"3722","DOI":"10.1007\/s11695-022-06280-w","article-title":"Women\u2019s Reasons to Seek Bariatric Surgery and Their Expectations on the Surgery Outcome\u2014A Multicenter Study from Five European Countries","volume":"32","author":"Hult","year":"2022","journal-title":"Obes. Surg."},{"key":"ref_12","unstructured":"Glazer, S., and Biertho, L. (2026, March 09). Canadian Adult Obesity Clinical Practice Guidelines: Bariatric Surgery: Selection & Pre-Operative Workup. Available online: https:\/\/obesitycanada.ca\/guidelines\/preop."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1764","DOI":"10.1007\/s11695-024-07196-3","article-title":"Metabolic Bariatric Surgery Across the IFSO Chapters: Key Insights on the Baseline Patient Demographics, Procedure Types, and Mortality from the Eighth IFSO Global Registry Report","volume":"34","author":"Brown","year":"2024","journal-title":"Obes. Surg."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Benhalima, K., Minschart, C., Ceulemans, D., Bogaerts, A., Van Der Schueren, B., Mathieu, C., and Devlieger, R. (2018). Screening and Management of Gestational Diabetes Mellitus after Bariatric Surgery. Nutrients, 10.","DOI":"10.3390\/nu10101479"},{"key":"ref_15","first-page":"e10811","article-title":"A Review of the Impact of Bariatric Surgery in Women with Polycystic Ovary Syndrome","volume":"12","author":"Lee","year":"2020","journal-title":"Cureus"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"3075","DOI":"10.1007\/s11695-025-08003-3","article-title":"Sexual Well-Being After Bariatric Surgery Assessed with New Sexual Satisfaction Scale: A Case-Matched Study of Men and Women","volume":"35","author":"Wysocki","year":"2025","journal-title":"Obes. Surg."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"337","DOI":"10.4158\/EP12437.GL","article-title":"Clinical Practice Guidelines for the Perioperative Nutritional, Metabolic, and Nonsurgical Support of the Bariatric Surgery Patient\u20142013 Update: Cosponsored by American Association of Clinical Endocrinologists, the Obesity Society, and American Society for Metabolic & Bariatric Surgery","volume":"19","author":"Mechanick","year":"2013","journal-title":"Endocr. Pract."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"(2019). ACOG Committee Opinion No. 775 Nonobstetric Surgery during Pregnancy. Obstet. Gynecol., 133, E285\u2013E286.","DOI":"10.1097\/AOG.0000000000003174"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"101263","DOI":"10.1016\/j.lanepe.2025.101263","article-title":"Maternal and Neonatal Outcomes of Pregnancies after Metabolic Bariatric Surgery: A Retrospective Population-Based Study","volume":"51","author":"Tropeano","year":"2025","journal-title":"Lancet Reg. Health Eur."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Voros, C., Varthaliti, A., Bananis, K., Mavrogianni, D., Athanasiou, D., Athanasiou, A., Athanasiou, A., Papahliou, A.M., Zografos, C.G., and Kondili, P. (2025). The Relationship Between Obesity, Bariatric Surgery, and Infertility: A Systematic Review. Life, 15.","DOI":"10.3390\/life15050758"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1507","DOI":"10.1111\/obr.12927","article-title":"Pregnancy after Bariatric Surgery: Consensus Recommendations for Periconception, Antenatal and Postnatal Care","volume":"20","author":"Shawe","year":"2019","journal-title":"Obes. Rev."},{"key":"ref_22","unstructured":"(2025, December 13). An Overview of Current Contraceptive Modalities and Historical Perspectives: A Review\u2014GREM\u2014Gynecological and Reproductive Endocrinology & Metabolism. Available online: https:\/\/gremjournal.com\/journal\/01-2024\/an-overview-of-current-contraceptive-modalities-and-historical-perspectives-a-review\/."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"96","DOI":"10.5694\/mja2.51373","article-title":"Fertility, Pregnancy and Post Partum Management after Bariatric Surgery: A Narrative Review","volume":"216","author":"Cheah","year":"2022","journal-title":"Med. J. Aust."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1159\/000449508","article-title":"Oral Contraceptives after Bariatric Surgery","volume":"10","author":"Schlatter","year":"2017","journal-title":"Obes. Facts"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"597","DOI":"10.1159\/000481825","article-title":"Practical Recommendations of the Obesity Management Task Force of the European Association for the Study of Obesity for the Post-Bariatric Surgery Medical Management","volume":"10","author":"Busetto","year":"2017","journal-title":"Obes. Facts"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1030","DOI":"10.1093\/humupd\/dmab022","article-title":"The Effects of Bariatric Surgery on Periconception Maternal Health: A Systematic Review and Meta-Analysis","volume":"27","author":"Snoek","year":"2021","journal-title":"Hum. Reprod. Update"},{"key":"ref_27","first-page":"453","article-title":"Obesity and Hormonal Contraceptive Efficacy","volume":"9","author":"Robinson","year":"2013","journal-title":"Womens Health"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"420","DOI":"10.1016\/j.contraception.2007.01.013","article-title":"The Contraceptive Vaginal Ring Compared with the Combined Oral Contraceptive Pill: A Comprehensive Review of Randomized Controlled Trials","volume":"75","author":"Roumen","year":"2007","journal-title":"Contraception"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"591","DOI":"10.5603\/GP.2016.0050","article-title":"The Use of Contraception for Patients after Bariatric Surgery","volume":"87","author":"Ostrowska","year":"2016","journal-title":"Ginekol. Pol."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"110725","DOI":"10.1016\/j.contraception.2024.110725","article-title":"Society of Family Planning Committee Statement: Contraception and Body Weight","volume":"141","author":"Zwayne","year":"2024","journal-title":"Contraception"},{"key":"ref_31","unstructured":"Rasmussen, K.M., and Yaktine, A.L. (2009). Weight Gain During Pregnancy: Reexamining the Guidelines, National Academies Press."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"343","DOI":"10.1007\/s00404-022-06480-w","article-title":"Risk Factors of Lower Birth Weight, Small-for-Gestational-Age Infants, and Preterm Birth in Pregnancies Following Bariatric Surgery: A Scoping Review","volume":"307","author":"Yu","year":"2023","journal-title":"Arch. Gynecol. Obstet."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"2072","DOI":"10.1007\/s11695-020-05219-3","article-title":"A Matter of Timing-Pregnancy After Bariatric Surgery","volume":"31","author":"Heusschen","year":"2021","journal-title":"Obes. Surg."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Montvignier Monnet, A., Savoy, D., Pr\u00e9aubert, L., Hoffmann, P., and B\u00e9try, C. (2022). In Underweight Women, Insufficient Gestational Weight Gain Is Associated with Adverse Obstetric Outcomes. Nutrients, 15.","DOI":"10.20944\/preprints202211.0266.v1"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Huang, X., Liu, J., Qi, L., Adachi, J.D., Wu, J., Li, Z., Meng, Q., Li, G., and Lip, G.Y.H. (2022). Birth Weight and the Risk of Cardiovascular Outcomes: A Report From the Large Population-Based UK Biobank Cohort Study. Front. Cardiovasc. Med., 9.","DOI":"10.3389\/fcvm.2022.827491"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1325","DOI":"10.1007\/s11695-021-05822-y","article-title":"Maternal Nutritional Status and Pregnancy Outcomes Post-Bariatric Surgery","volume":"32","author":"Alamri","year":"2022","journal-title":"Obes. Surg."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"876","DOI":"10.1111\/jpc.13593","article-title":"Long-Term Outcomes for Large for Gestational Age Infants Born at Term","volume":"53","author":"Khambalia","year":"2017","journal-title":"J. Paediatr. Child. Health"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"2157","DOI":"10.1038\/s41598-020-58827-5","article-title":"Large-for-Gestational-Age Phenotypes and Obesity Risk in Adulthood: A Study of 195,936 Women","volume":"10","author":"Derraik","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1921","DOI":"10.1016\/j.jand.2019.02.008","article-title":"Effects of Bariatric Surgery on Maternal and Infant Outcomes of Pregnancy\u2014An Evidence Analysis Center Systematic Review","volume":"119","author":"Hakeem","year":"2019","journal-title":"J. Acad. Nutr. Diet."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1344","DOI":"10.1016\/j.soard.2021.02.029","article-title":"Pregnant Patients with Internal Hernia after Gastric Bypass: A Single-Center Experience","volume":"17","year":"2021","journal-title":"Surg. Obes. Relat. Dis."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"100275","DOI":"10.1016\/j.clinme.2024.100275","article-title":"The Approach to a Pregnancy after Bariatric Surgery","volume":"25","author":"Morgan","year":"2024","journal-title":"Clin. Med."},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Kahramangil, B., Menzo, E.L., Szomstein, S., and Rosenthal, R. (2023). Dumping Syndrome. The SAGES Manual of Physiologic Evaluation of Foregut Diseases, Springer.","DOI":"10.1007\/978-3-031-39199-6_25"},{"key":"ref_43","first-page":"187","article-title":"The Challenges of Diagnosing Gestational Diabetes after Bariatric Surgery: Where Do We Stand?","volume":"18","author":"Nunes","year":"2025","journal-title":"Obes. Facts"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1159\/000514847","article-title":"Prevalence of Micronutrient Deficiency after Bariatric Surgery","volume":"14","author":"Krzizek","year":"2021","journal-title":"Obes. Facts"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1038\/nrendo.2016.37","article-title":"Micronutrient Deficiencies in Pregnancy Worldwide: Health Effects and Prevention","volume":"12","author":"Gernand","year":"2016","journal-title":"Nat. Rev. Endocrinol."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"873","DOI":"10.1007\/s11695-021-05783-2","article-title":"Vitamin B Complex Deficiency After Roux-En-Y Gastric Bypass and Sleeve Gastrectomy\u2014A Systematic Review and Meta-Analysis","volume":"32","author":"Nunes","year":"2022","journal-title":"Obes. Surg."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"682","DOI":"10.1007\/s11695-020-04943-0","article-title":"Haemoglobin and Hematinic Status Before and After Bariatric Surgery over 4 Years of Follow-Up","volume":"31","author":"Shipton","year":"2021","journal-title":"Obes. Surg."},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Dong, J., Yin, L.L., Deng, X.D., Ji, C.Y., Pan, Q., Yang, Z., Peng, T., Wu, J.N., Wu, G.H., and Zhou, L.Y. (2023). Initiation and Duration of Folic Acid Supplementation in Preventing Congenital Malformations. BMC Med., 21.","DOI":"10.1186\/s12916-023-03000-8"},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Vynckier, A.K., Ceulemans, D., Vanheule, G., De Mulder, P., Van Den Driessche, M., and Devlieger, R. (2021). Periconceptional Folate Supplementation in Women after Bariatric Surgery\u2014A Narrative Review. Nutrients, 13.","DOI":"10.3390\/nu13051557"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"e13087","DOI":"10.1111\/obr.13087","article-title":"British Obesity and Metabolic Surgery Society Guidelines on Perioperative and Postoperative Biochemical Monitoring and Micronutrient Replacement for Patients Undergoing Bariatric Surgery\u20142020 Update","volume":"21","author":"Parretti","year":"2020","journal-title":"Obes. Rev."},{"key":"ref_51","unstructured":"National Institute for Health and Care Excellence (NICE) (2026, March 09). Maternal and Child Nutrition: Nutrition and Weight Management in Pregnancy, and Nutrition in Children up to 5 Years. Available online: https:\/\/www.nice.org.uk\/guidance\/ng247."},{"key":"ref_52","doi-asserted-by":"crossref","unstructured":"Sandvik, J., Bjerkan, K.K., Gr\u00e6slie, H., Hoff, D.A.L., Johnsen, G., Kl\u00f6ckner, C., M\u00e5rvik, R., Nymo, S., Hyldmo, \u00c5.A., and Kulseng, B.E. (2021). Iron Deficiency and Anemia 10 Years After Roux-En-Y Gastric Bypass for Severe Obesity. Front. Endocrinol., 12.","DOI":"10.3389\/fendo.2021.679066"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"445","DOI":"10.1017\/S0029665118000149","article-title":"Iron Deficiency after Bariatric Surgery: What Is the Real Problem?","volume":"77","author":"Steenackers","year":"2018","journal-title":"Proc. Nutr. Soc."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"810","DOI":"10.3945\/ajcn.112.039255","article-title":"Heme- and Nonheme-Iron Absorption and Iron Status 12 Mo after Sleeve Gastrectomy and Roux-En-Y Gastric Bypass in Morbidly Obese Women","volume":"96","author":"Ruz","year":"2012","journal-title":"Am. J. Clin. Nutr."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"993","DOI":"10.1002\/ijgo.70529","article-title":"FIGO Good Practice Recommendations on Anemia in Pregnancy, to Reduce the Incidence and Impact of Postpartum Hemorrhage (PPH)","volume":"171","author":"Ubom","year":"2025","journal-title":"Int. J. Gynecol. Obstet."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"146","DOI":"10.15537\/smj.2015.2.10289","article-title":"The Impact of Maternal Iron Deficiency and Iron Deficiency Anemia on Child\u2019s Health","volume":"36","author":"Jan","year":"2015","journal-title":"Saudi Med. J."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"727","DOI":"10.1016\/j.soard.2016.12.018","article-title":"American Society for Metabolic and Bariatric Surgery Integrated Health Nutritional Guidelines for the Surgical Weight Loss Patient 2016 Update: Micronutrients","volume":"13","author":"Parrott","year":"2017","journal-title":"Surg. Obes. Relat. Dis."},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"151","DOI":"10.1177\/1753495X211013624","article-title":"Micronutrient Screening, Monitoring, and Supplementation in Pregnancy after Bariatric Surgery","volume":"15","author":"Huang","year":"2021","journal-title":"Obstet. Med."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"3608","DOI":"10.1007\/s11695-024-07446-4","article-title":"Nutrient Status and Supplement Use During Pregnancy Following Metabolic Bariatric Surgery: A Multicenter Observational Cohort Study","volume":"34","author":"Heusschen","year":"2024","journal-title":"Obes. Surg."},{"key":"ref_60","doi-asserted-by":"crossref","unstructured":"Slater, C., Morris, L., Ellison, J., and Syed, A.A. (2017). Nutrition in Pregnancy Following Bariatric Surgery. Nutrients, 9.","DOI":"10.3390\/nu9121338"},{"key":"ref_61","doi-asserted-by":"crossref","unstructured":"Maia, S.B., Souza, A.S.R., Caminha, M.D.F.C., da Silva, S.L., Cruz, R.d.S.B.L.C., Dos Santos, C.C., and Filho, M.B. (2019). Vitamin A and Pregnancy: A Narrative Review. Nutrients, 11.","DOI":"10.3390\/nu11030681"},{"key":"ref_62","first-page":"492060","article-title":"Nutrition and Pregnancy after Bariatric Surgery","volume":"2013","author":"Kaska","year":"2013","journal-title":"ISRN Obes."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"798","DOI":"10.1007\/s11695-017-2932-y","article-title":"High Incidence of Secondary Hyperparathyroidism in Bariatric Patients: Comparing Different Procedures","volume":"28","author":"Wei","year":"2018","journal-title":"Obes. Surg."},{"key":"ref_64","first-page":"3838","article-title":"Correlation of Vitamin E Level during Pregnancy with Maternal and Neonatal Health Outcomes: A Meta-Analysis and Systematic Review","volume":"15","author":"Wang","year":"2023","journal-title":"Am. J. Transl. Res."},{"key":"ref_65","doi-asserted-by":"crossref","unstructured":"Shi, H., Jiang, Y., Yuan, P., Chen, L., Gong, X., Yang, Y., Wang, Y., Jiang, H., Li, Y., and Sun, M. (2022). Association of Gestational Vitamin E Status with Pre-Eclampsia: A Retrospective, Multicenter Cohort Study. Front. Nutr., 9.","DOI":"10.3389\/fnut.2022.911337"},{"key":"ref_66","unstructured":"Iswara, R.P., Yunus, K., and Pati, N. (2023). Vitamin K Deficiency. Causes and Management of Nutritional Deficiency Disorders, IGI Global Scientific Publishing."},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"e127","DOI":"10.1097\/AOG.0000000000005870","article-title":"Maternal and Neonatal Hemorrhage From Vitamin K Deficiency in the Setting of Crohn Disease in Pregnancy","volume":"145","author":"Lammers","year":"2025","journal-title":"Obstet. Gynecol."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1017\/S0007114521002865","article-title":"Hyperemesis Gravidarum and Vitamin K Deficiency: A Systematic Review","volume":"128","author":"Nijsten","year":"2022","journal-title":"Br. J. Nutr."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"E28434","DOI":"10.1097\/MD.0000000000028434","article-title":"Fetal Intracranial Hemorrhage and Maternal Vitamin K Deficiency Induced by Total Parenteral Nutrition: A Case Report","volume":"101","author":"Lee","year":"2022","journal-title":"Medicine"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"885","DOI":"10.1016\/j.soard.2014.04.032","article-title":"Vitamin K1 Monitoring in Pregnancies after Bariatric Surgery: A Prospective Cohort Study","volume":"10","author":"Jans","year":"2014","journal-title":"Surg. Obes. Relat. Dis."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1097\/MPG.0000000000001232","article-title":"Prevention of Vitamin K Deficiency Bleeding in Newborn Infants: A Position Paper by the ESPGHAN Committee on Nutrition","volume":"63","author":"Mihatsch","year":"2016","journal-title":"J. Pediatr. Gastroenterol. Nutr."},{"key":"ref_72","doi-asserted-by":"crossref","unstructured":"Devlieger, R., Guelinckx, I., Jans, G., Voets, W., Vanholsbeke, C., and Vansant, G. (2014). Micronutrient Levels and Supplement Intake in Pregnancy after Bariatric Surgery: A Prospective Cohort Study. PLoS ONE, 9.","DOI":"10.1371\/journal.pone.0114192"},{"key":"ref_73","unstructured":"Ganipisetti, V.M., and Naha, S. (2023). Bariatric Surgery Malnutrition Complications. StatPearls, StatPearls."},{"key":"ref_74","first-page":"e55062","article-title":"Nutritional Deficiencies Before and After Bariatric Surgery in Low- and High-Income Countries: Prevention and Treatment","volume":"16","author":"Kamal","year":"2024","journal-title":"Cureus"},{"key":"ref_75","doi-asserted-by":"crossref","first-page":"464","DOI":"10.4239\/wjd.v8.i11.464","article-title":"Bariatric Surgery and Long-Term Nutritional Issues","volume":"8","author":"Lupoli","year":"2017","journal-title":"World J. Diabetes"},{"key":"ref_76","doi-asserted-by":"crossref","first-page":"658","DOI":"10.1111\/cen.13041","article-title":"Nutritional Follow-up of Patients after Obesity Surgery: Best Practice","volume":"84","author":"Barth","year":"2016","journal-title":"Clin. Endocrinol."},{"key":"ref_77","doi-asserted-by":"crossref","unstructured":"R\u00f3\u017ca\u0144ska-Wal\u0119dziak, A., Wal\u0119dziak, M., Mierzejewska, A., Skopi\u0144ska, E., J\u0119drysik, M., and Che\u0142stowska, B. (2023). Nutritional Implications of Bariatric Surgery on Pregnancy Management-A Narrative Review of the Literature. Medicina, 59.","DOI":"10.3390\/medicina59101864"},{"key":"ref_78","doi-asserted-by":"crossref","unstructured":"Ma, Z.F., and Brough, L. (2025). Effect of Iodine Nutrition During Pregnancy and Lactation on Child Cognitive Outcomes: A Review. Nutrients, 17.","DOI":"10.3390\/nu17122016"},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1007\/s11695-017-2833-0","article-title":"Iodine Status After Bariatric Surgery\u2014A Prospective 10-Year Report from the Swedish Obese Subjects (SOS) Study","volume":"28","author":"Manousou","year":"2017","journal-title":"Obes. Surg."},{"key":"ref_80","doi-asserted-by":"crossref","unstructured":"Moreno-Reyes, R., Fuentes Pe\u00f1a, C., Nu\u00f1ez, J.F., S\u00e1nchez, M.B., Carvajal, J.J., Roble, K., Mendoza-Le\u00f3n, M.J., Rangel-Ram\u00edrez, M.A., Opazo, M.C., and Lay, M.K. (2025). Critical Role of Iodine and Thyroid Hormones During Pregnancy. Int. J. Mol. Sci., 26.","DOI":"10.20944\/preprints202508.0703.v1"},{"key":"ref_81","doi-asserted-by":"crossref","first-page":"e130","DOI":"10.1111\/1471-0528.18088","article-title":"Management of Thyroid Disorders in Pregnancy","volume":"132","author":"Chan","year":"2025","journal-title":"BJOG"},{"key":"ref_82","doi-asserted-by":"crossref","unstructured":"Burlina, S., Dalfr\u00e0, M.G., and Lapolla, A. (2023). Pregnancy after Bariatric Surgery: Nutrition Recommendations and Glucose Homeostasis: A Point of View on Unresolved Questions. Nutrients, 15.","DOI":"10.3390\/nu15051244"},{"key":"ref_83","doi-asserted-by":"crossref","first-page":"103038","DOI":"10.1016\/j.amsu.2021.103038","article-title":"Bariatric Surgery and Its Impact on Fertility, Pregnancy and Its Outcome: A Narrative Review","volume":"72","author":"Payus","year":"2021","journal-title":"Ann. Med. Surg."},{"key":"ref_84","doi-asserted-by":"crossref","unstructured":"Stephansson, O., Johansson, K., S\u00f6derling, J., N\u00e4slund, I., and Neovius, M. (2018). Delivery Outcomes in Term Births after Bariatric Surgery: Population-Based Matched Cohort Study. PLoS Med., 15.","DOI":"10.1371\/journal.pmed.1002656"},{"key":"ref_85","doi-asserted-by":"crossref","first-page":"1387","DOI":"10.1007\/s11695-025-07762-3","article-title":"Impact of Prior Bariatric Surgery on Labor and Delivery-Related Outcomes: A Nationwide Study","volume":"35","author":"Pinnam","year":"2025","journal-title":"Obes. Surg."},{"key":"ref_86","doi-asserted-by":"crossref","first-page":"4141","DOI":"10.2147\/JPR.S495666","article-title":"Advances in Epidural Labor Analgesia for Obese Parturients","volume":"17","author":"Liu","year":"2024","journal-title":"J. Pain Res."},{"key":"ref_87","doi-asserted-by":"crossref","first-page":"102471","DOI":"10.1016\/j.bpobgyn.2024.102471","article-title":"Venous Thromboembolism in Pregnant Obese Individuals","volume":"94","author":"Navti","year":"2024","journal-title":"Best. Pract. Res. Clin. Obstet. Gynaecol."},{"key":"ref_88","doi-asserted-by":"crossref","first-page":"35","DOI":"10.5603\/AA.2017.0008","article-title":"Venous Thromboembolism\u2014Recommendations on the Prevention, Diagnostic Approach and Management. The 2017 Polish Consensus Statement","volume":"23","author":"Tomkowski","year":"2017","journal-title":"Acta Angiol."},{"key":"ref_89","doi-asserted-by":"crossref","first-page":"595","DOI":"10.1016\/j.soard.2024.11.017","article-title":"Breastfeeding in metabolic and bariatric patients: A comprehensive guide for surgeons, patients, and the multidisciplinary team","volume":"21","author":"Suri","year":"2024","journal-title":"Surg. Obes. Relat. 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