{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T18:38:27Z","timestamp":1787769507369,"version":"build-2784847793"},"reference-count":58,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,7,7]],"date-time":"2025-07-07T00:00:00Z","timestamp":1751846400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,7,7]],"date-time":"2025-07-07T00:00:00Z","timestamp":1751846400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Nutrition Bulletin"],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>This study aimed to investigate whether serum vitamin B12 concentration is associated with placental weight and maternal sociodemographic characteristics in pregnant women who delivered in a tertiary hospital. A total of 497 pregnant women with a single foetus who had achieved 37\u2009weeks gestational age were included in this cross\u2010sectional study. All pregnant women were evaluated via a questionnaire about nutrition and dietary habits, weight gain during pregnancy, antenatal multivitamin supplementation and sociodemographic features. The serum vitamin B12 levels were measured in pregnant women, and their placentas were weighed immediately after delivery. Vitamin B12 deficiency was observed in about 79.5% of pregnant women, despite 63% of participants reporting the use of antenatal multivitamin supplements. Household economic status and pre\u2010pregnancy body mass index (BMI) were identified as significant factors associated with maternal vitamin B12 levels. Furthermore, household economic status and maternal age were found to be significant factors associated with placental weight. This study identified a high prevalence of vitamin B12 deficiency among pregnant women with low family incomes. Moreover, it revealed a relationship between placental weight and household economic status. The findings also highlight that despite a relatively high rate of antenatal multivitamin supplementation, vitamin B12 deficiency remains a critical issue. No statistically significant relationship between placental weight and serum vitamin B12 concentration has been detected. Further large\u2010scale and prospective studies are needed to establish the effect of maternal vitamin B12 levels on placental weight.<\/jats:p>","DOI":"10.1111\/nbu.70019","type":"journal-article","created":{"date-parts":[[2025,7,7]],"date-time":"2025-07-07T03:23:01Z","timestamp":1751858581000},"page":"436-446","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Associations Between Maternal Vitamin\n                    <scp>B12<\/scp>\n                    Levels, Sociodemographic Factors and Placental Weight: A Cross\u2010Sectional Analysis in a Tertiary Hospital"],"prefix":"10.1111","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5321-0739","authenticated-orcid":false,"given":"Sema","family":"Baki Yildirim","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Faculty of Medicine, Giresun University  Giresun Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7101-4838","authenticated-orcid":false,"given":"\u00d6zlem","family":"Ko\u015far Can","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Faculty of Medicine, Pamukkale University  Denizli Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5115-8890","authenticated-orcid":false,"given":"Emine","family":"Tekin","sequence":"additional","affiliation":[{"name":"Division of Pediatric Neurology, Department of Pediatrics Faculty of Medicine, Giresun University  Giresun Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9074-8466","authenticated-orcid":false,"given":"Handan","family":"Ayhan Akoglu","sequence":"additional","affiliation":[{"name":"Department of Pediatrics Faculty of Medicine, Giresun University  Giresun Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5963-1267","authenticated-orcid":false,"given":"Muhammet","family":"Bulut","sequence":"additional","affiliation":[{"name":"Department of Pediatrics Faculty of Medicine, Giresun University  Giresun Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,7,7]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1080\/00365513.2023.2297357"},{"issue":"8","key":"e_1_2_7_3_1","first-page":"613","article-title":"Biochemical Assessment of Nutritional Status in Pre\u2010 and Post\u2010Natal Turkish Women and Outcome of Pregnancy","volume":"49","author":"Ackurt F.","year":"1995","journal-title":"European Journal of Clinical Nutrition"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000004251"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884\u2010019\u20102619\u20106"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.placenta.2010.04.010"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1515\/cclm\u20102014\u20100784"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.3109\/08880018.2013.829894"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.4103\/ijcm.IJCM_403_19"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0022\u20103476(67)80066\u20100"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884\u2010019\u20102571\u20105"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.midw.2010.07.006"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.4082\/kjfm.2013.34.6.393"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.2008.156133"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu13103530"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1155\/2021\/6652231"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0112586"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10995\u2010014\u20101662\u20101"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu11020397"},{"key":"e_1_2_7_20_1","doi-asserted-by":"publisher","DOI":"10.3945\/an.115.008201"},{"key":"e_1_2_7_21_1","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.2009.173013"},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.1038\/nrdp.2017.40"},{"key":"e_1_2_7_23_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471\u20100528.2011.03053.x"},{"key":"e_1_2_7_24_1","doi-asserted-by":"publisher","DOI":"10.3109\/14767058.2011.648244"},{"key":"e_1_2_7_25_1","volume-title":"Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin and Choline","author":"Institute of Medicine (IOM)","year":"1998"},{"key":"e_1_2_7_26_1","volume-title":"Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline","author":"Institute of Medicine (US), Standing Committee on the Scientific Evaluation of Dietary Reference Intakes and its Panel on Folate, Other B Vitamins, and Choline","year":"1998"},{"key":"e_1_2_7_27_1","doi-asserted-by":"publisher","DOI":"10.1042\/CS20060339"},{"key":"e_1_2_7_28_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0135268"},{"key":"e_1_2_7_29_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00394\u2010006\u20100598\u20107"},{"key":"e_1_2_7_30_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471\u20100528.13574"},{"key":"e_1_2_7_31_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0007114519000746"},{"key":"e_1_2_7_32_1","doi-asserted-by":"publisher","DOI":"10.1111\/jhn.12212"},{"key":"e_1_2_7_33_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002\u20109378(75)90526\u20108"},{"key":"e_1_2_7_34_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0143\u20104004(98)90105\u20109"},{"key":"e_1_2_7_35_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1368980021002627"},{"key":"e_1_2_7_36_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0046\u20108177(87)80170\u20103"},{"key":"e_1_2_7_37_1","volume-title":"The Practical Guide: Identification, Evaluation, and Treatment of Overweight and Obesity in Adults","author":"National Institutes of Health (NIH), National Heart, Lung, and Blood Institute (NHLBI), North American Association for the Study of Obesity (NAASO)","year":"2000"},{"key":"e_1_2_7_38_1","doi-asserted-by":"publisher","DOI":"10.4274\/tpa.45.242"},{"key":"e_1_2_7_39_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu13103450"},{"key":"e_1_2_7_40_1","first-page":"174","volume-title":"OECD\u2010FAO Agricultural Outlook 2021\u20132030","author":"Organisation for Economic Co\u2010operation and Development (OECD) & Food and Agriculture Organization of the United Nations (FAO)","year":"2021"},{"key":"e_1_2_7_41_1","doi-asserted-by":"publisher","DOI":"10.1111\/ejh.13571"},{"key":"e_1_2_7_42_1","doi-asserted-by":"publisher","DOI":"10.1093\/aje\/kwp182"},{"key":"e_1_2_7_43_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.domaniend.2020.106577"},{"key":"e_1_2_7_44_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.placenta.2011.03.001"},{"key":"e_1_2_7_45_1","doi-asserted-by":"publisher","DOI":"10.1097\/00003081\u2010200606000\u201000007"},{"key":"e_1_2_7_46_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365\u20103016.2008.00935.x"},{"key":"e_1_2_7_47_1","volume-title":"Nutrition During Pregnancy and Lactation, Prenatal Period\u20102","author":"Samur F. G.","year":"2021"},{"key":"e_1_2_7_48_1","doi-asserted-by":"publisher","DOI":"10.14744\/TurkPediatriArs.2020.14042"},{"key":"e_1_2_7_49_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1368980018000459"},{"key":"e_1_2_7_50_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu8030162"},{"key":"e_1_2_7_51_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ogc.2010.02.013"},{"key":"e_1_2_7_52_1","doi-asserted-by":"publisher","DOI":"10.1001\/archinte.159.12.1289"},{"key":"e_1_2_7_53_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu8120768"},{"key":"e_1_2_7_54_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.placenta.2023.06.001"},{"key":"e_1_2_7_55_1","doi-asserted-by":"publisher","DOI":"10.3389\/fnut.2023.1060709"},{"key":"e_1_2_7_56_1","unstructured":"The Turkish Ministry of Health General Directorate of Primary Health Care Services and Hacettepe University Department of Nutrition and Dietetics.2012.The nutrition guide for Turkey. Accessed 25 November 2019.https:\/\/ekutuphane.saglik.gov.tr\/Home\/GetDocument\/358."},{"key":"e_1_2_7_57_1","volume-title":"The Asia\u2013Pacific Perspective: Redefining Obesity and Its Treatment","author":"World Health Organization, Western Pacific Region","year":"2000"},{"key":"e_1_2_7_58_1","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2019.1633301"},{"key":"e_1_2_7_59_1","doi-asserted-by":"publisher","DOI":"10.1159\/000459633"}],"container-title":["Nutrition Bulletin"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/nbu.70019","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/nbu.70019","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/nbu.70019","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T02:37:48Z","timestamp":1773023868000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/nbu.70019"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,7,7]]},"references-count":58,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2025,9]]}},"alternative-id":["10.1111\/nbu.70019"],"URL":"https:\/\/doi.org\/10.1111\/nbu.70019","archive":["Portico"],"relation":{},"ISSN":["1471-9827","1467-3010"],"issn-type":[{"value":"1471-9827","type":"print"},{"value":"1467-3010","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,7,7]]},"assertion":[{"value":"2024-08-14","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-06-23","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-07-07","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}