{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T22:13:53Z","timestamp":1783808033413,"version":"3.55.0"},"reference-count":18,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T00:00:00Z","timestamp":1770940800000},"content-version":"vor","delay-in-days":12,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,2,1]],"date-time":"2026-02-01T00:00:00Z","timestamp":1769904000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aim<\/jats:title>\n                    <jats:p>This study investigated associations between late\u2010night shift work and perinatal outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Participants were pregnant women with recorded perinatal outcomes (late\u2010night shift group, 626 cases; non\u2010late\u2010night shift group, 6633 cases) identified from two Japanese Internet surveys. We analyzed the association between late\u2010night shift work and adverse perinatal outcomes. Furthermore, we examined factors associated with the use of Maternal Health Management and Guidance Cards.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The late\u2010night shift group had significantly higher rates of threatened miscarriage, premature rupture of membranes (PROM), use of the Maternal Health Management and Guidance Card, health problems requiring hospitalization, fetal health problems, and infectious diseases compared with the non\u2010late\u2010night shift group. However, other perinatal outcomes, including preterm birth, gestational age at delivery, mode of delivery, and birth weight, did not differ significantly between groups. Among late\u2010night shift\u2010working mothers, those who used the Maternal Health Management and Guidance Card had a higher incidence of hyperemesis gravidarum, threatened miscarriage, and preterm labor than those who did not.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Late\u2010night shift work during pregnancy may be associated with an increased risk of perinatal complications. The Maternal Health Management and Guidance Card may provide support for pregnant women engaged in late\u2010night shift work.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jog.70205","type":"journal-article","created":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T06:05:16Z","timestamp":1771049116000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Associations Between Late\u2010Night Shift Work and Perinatal Outcomes: A Nationwide Cross\u2010Sectional Study Using\n                    <scp>JACSIS<\/scp>\n                    and\n                    <scp>JASTIS<\/scp>\n                    Data"],"prefix":"10.1111","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-9952-7673","authenticated-orcid":false,"given":"Yuya","family":"Tanaka","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2395-9591","authenticated-orcid":false,"given":"Yoshifumi","family":"Kasuga","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiko","family":"Hosokawa","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Miyazaki Prefectural Miyazaki Hospital  Miyazaki Miyazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-8974-6898","authenticated-orcid":false,"given":"Junko","family":"Tamai","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuka","family":"Fukuma","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshimitsu","family":"Otani","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marie","family":"Fukutake","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoru","family":"Ikenoue","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Tabuchi","sequence":"additional","affiliation":[{"name":"Division of Epidemiology, School of Public Health Tohoku University Graduate School of Medicine  Sendai Miyagi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mamoru","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Keio University School of Medicine  Shinjuku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,2,13]]},"reference":[{"key":"e_1_2_11_2_1","unstructured":"Labor Standards Act (Act No. 49 of 1947) (2025) 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of Health Labour and Welfare Japan \u201cGuidance on the Use of the Maternal Health Management and Guidance Card \u201d(2025) https:\/\/www.mhlw.go.jp\/www2\/topics\/seido\/josei\/hourei\/20000401\u201025\u20101.htm."},{"key":"e_1_2_11_17_1","doi-asserted-by":"publisher","DOI":"10.1093\/ije\/dyab135"},{"key":"e_1_2_11_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/birt.12463"},{"key":"e_1_2_11_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.heliyon.2024.e30987"}],"container-title":["Journal of Obstetrics and Gynaecology 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