{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T11:23:32Z","timestamp":1788953012434,"version":"build-2803163510"},"reference-count":30,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,12,10]],"date-time":"2023-12-10T00:00:00Z","timestamp":1702166400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2024,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>We aimed to investigate the associations of endometriosis and adenomyosis with pregnancy complications by using a large\u2010scale Japanese database.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We retrospectively analyzed 145\u2009590 singleton pregnancies from the Japan Perinatal Registry Network Database. Pregnant women registered as having endometriosis or adenomyosis were designated as the case group (EA), whereas the control group (non\u2010EA) was selected using propensity\u2010score matching adjusted for variables such as age, parity, BMI, smoking history, and the use of assisted reproductive technology. The main outcomes included placental malposition, preterm birth, and hypertensive disorders of pregnancy (HDP).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In total, 1203 patients from both the EA and non\u2010EA groups were matched and evaluated. The EA group showed significantly higher rates of placenta previa (odds ratio [OR], 3.01; 95% confidence interval [CI], 1.84\u20134.92), low\u2010lying placenta (OR, 2.02; 95% CI, 1.06\u20133.86), and preterm birth (OR, 1.44; 95% CI, 1.13\u20131.84) than the non\u2010EA group. However, no significant difference was observed in the incidence of HDP (OR, 1.22; 95% CI, 0.90\u20131.66).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The use of propensity\u2010score matching to analyze a nationwide perinatal database in Japan clarified that EA was associated with increased pregnancy complications, specifically placental malposition, including placenta previa and low\u2010lying placenta, and preterm birth, but not with HDP.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jog.15849","type":"journal-article","created":{"date-parts":[[2023,12,11]],"date-time":"2023-12-11T03:49:43Z","timestamp":1702266583000},"page":"351-357","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Increased risk of placenta previa and preterm birth in pregnant women with endometriosis\/adenomyosis: A propensity\u2010score matching analysis of a nationwide perinatal database in Japan"],"prefix":"10.1111","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0248-1368","authenticated-orcid":false,"given":"Kosuke","family":"Kato","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology The University of Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7970-6695","authenticated-orcid":false,"given":"Takayuki","family":"Iriyama","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology The University of Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Konan","family":"Hara","sequence":"additional","affiliation":[{"name":"Department of Economics University of Arizona  Tucson Arizona USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kensuke","family":"Suzuki","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology The University of Tokyo  Tokyo 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