{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T15:33:12Z","timestamp":1792251192013,"version":"4.4.0"},"reference-count":16,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,12,23]],"date-time":"2025-12-23T00:00:00Z","timestamp":1766448000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Reprod Medicine &amp; Biology"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To summarize assisted reproductive technology (ART) data for 2023 collected through the Japan Society of Obstetrics and Gynecology registry.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods and Results<\/jats:title>\n                    <jats:p>625 out of 638 registered ART facilities took part in the study, documenting 561\u2009664 treatment cycles and 85\u2009048 newborns (+3.3% and +10.2% increases from 2022). The average age of women undergoing treatment was 37.3\u2009years (standard deviation: 4.8); 205\u2009986\u2009cycles (36.7%) involved women aged \u2265\u200940\u2009years. Among fresh cycles, oocyte retrieval was performed in 281\u2009665\u2009cycles, including 168 343 freeze\u2010all cycles (59.8%). A total of 2329 pregnancies and 3375 newborns resulted from in\u00a0vitro fertilization and intracytoplasmic sperm injection cycles, yielding 1772 and 2502 newborns, respectively. The overall rates for single embryo transfer (SET) and singleton delivery were 80.5% and 96.5%. Frozen\u2013thawed embryo transfer accounted for 271\u2009361\u2009cycles, resulting in 109\u2009850 pregnancies and 80\u2009774 newborns, with a SET rate of 84.7% and a singleton delivery rate of 96.3%.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In 2023, the second year of insurance coverage, the registry recorded the highest numbers of treatment cycles and newborns. Effective registry systems planned for 2026 will enable comprehensive evaluation of emerging trends in Japanese ART practice.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/rmb2.70008","type":"journal-article","created":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T07:16:36Z","timestamp":1766560596000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Assisted Reproductive Technology in Japan: A Summary Report for 2023 by the Committee on Professional Scientific Conduct and Clinical Ethics of the Japan Society of Obstetrics and Gynecology"],"prefix":"10.1002","volume":"25","author":[{"given":"Yukiko","family":"Katagiri","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology, Faculty of Medicine Toho University  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seung Chik","family":"Jwa","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Jichi Medical University  Tochigi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akira","family":"Kuwahara","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Graduate School of Biomedical Sciences Tokushima University  Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeshi","family":"Iwasa","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Graduate School of Biomedical Sciences Tokushima University  Tokushima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masanori","family":"Ono","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Tokyo Medical University  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keiichi","family":"Kato","sequence":"additional","affiliation":[{"name":"Kato Ladies Clinic  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1562-410X","authenticated-orcid":false,"given":"Hiroshi","family":"Kishi","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology The Jikei University School of Medicine  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1622-4063","authenticated-orcid":false,"given":"Yoshimitsu","family":"Kuwabara","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Nippon Medical School  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6922-0632","authenticated-orcid":false,"given":"Fuminori","family":"Taniguchi","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Tottori University Faculty of Medicine  Tottori 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