{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,4]],"date-time":"2026-11-04T20:55:53Z","timestamp":1793825753950,"version":"4.6.1"},"reference-count":90,"publisher":"BMJ","issue":"8","license":[{"start":{"date-parts":[[2022,8,26]],"date-time":"2022-08-26T00:00:00Z","timestamp":1661472000000},"content-version":"unspecified","delay-in-days":25,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001711","name":"Schweizerischer Nationalfonds zur F\u00f6rderung der Wissenschaftlichen Forschung","doi-asserted-by":"publisher","award":["160909"],"award-info":[{"award-number":["160909"]}],"id":[{"id":"10.13039\/501100001711","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001711","name":"Schweizerischer Nationalfonds zur F\u00f6rderung der Wissenschaftlichen Forschung","doi-asserted-by":"publisher","award":["197831"],"award-info":[{"award-number":["197831"]}],"id":[{"id":"10.13039\/501100001711","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open"],"accepted":{"date-parts":[[2022,6,16]]},"published-print":{"date-parts":[[2022,8]]},"abstract":"<jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>\n                      <jats:italic>Mycoplasma hominis, Ureaplasma urealyticum<\/jats:italic>\n                      and\n                      <jats:italic>Ureaplasma parvum<\/jats:italic>\n                      (genital mycoplasmas) commonly colonise the urogenital tract in pregnant women. This systematic review aims to investigate their role in adverse pregnancy and birth outcomes, alone or in combination with bacterial vaginosis (BV).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We searched Embase, Medline and CINAHL databases from January 1971 to February 2021. Eligible studies tested for any of the three genital mycoplasmas during pregnancy and reported on the primary outcome, preterm birth (PTB) and\/or secondary outcomes low birth weight (LBW), premature rupture of membranes (PROM), spontaneous abortion (SA) and\/or perinatal or neonatal death (PND).<\/jats:p>\n                    <jats:p>Two reviewers independently screened titles and abstracts, read potentially eligible full texts and extracted data. Two reviewers independently assessed risks of bias using published checklists. Random effects meta-analysis was used to estimate summary ORs (with 95% CIs and prediction intervals). Multivariable and stratified analyses were synthesised descriptively.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Of 53\/1194 included studies, 36 were from high-income countries. In meta-analysis of unadjusted ORs,\n                      <jats:italic>M. hominis<\/jats:italic>\n                      was associated with PTB (OR 1.87, 95%\u2009CI 1.49 to 2.34), PROM, LBW and PND but not SA.\n                      <jats:italic>U. urealyticum<\/jats:italic>\n                      was associated with PTB (OR 1.96, 95%\u2009CI 1.14 to 1.39), PROM, and SA.\n                      <jats:italic>U. parvum<\/jats:italic>\n                      was associated with PTB (1.79, 95%\u2009CI 1.28 to 2.52) and PROM. Seven of 53 studies reported any multivariable analysis. In two studies, analyses stratified by BV status showed that\n                      <jats:italic>M. hominis<\/jats:italic>\n                      and\n                      <jats:italic>U. parvum<\/jats:italic>\n                      were more strongly associated with PTB in the presence than in the absence of BV. The most frequent source of bias was a failure to control for confounding.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The currently available literature does not allow conclusions about the role of mycoplasmas in adverse pregnancy and birth outcomes, alone or with coexisting BV. Future studies that consider genital mycoplasmas in the context of the vaginal microbiome are needed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>PROSPERO registration number<\/jats:title>\n                    <jats:p>CRD42016050962.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bmjopen-2022-062990","type":"journal-article","created":{"date-parts":[[2022,8,26]],"date-time":"2022-08-26T11:21:39Z","timestamp":1661512899000},"page":"e062990","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":68,"title":["Adverse pregnancy and birth outcomes associated with\n                    <i>Mycoplasma hominis, Ureaplasma urealyticum<\/i>\n                    and\n                    <i>Ureaplasma parvum<\/i>\n                    : a systematic review and 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