{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T15:08:09Z","timestamp":1792163289317,"version":"4.4.0"},"reference-count":44,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2025,8,3]],"date-time":"2025-08-03T00:00:00Z","timestamp":1754179200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010663","name":"H2020 European Research Council","doi-asserted-by":"publisher","award":["101076986"],"award-info":[{"award-number":["101076986"]}],"id":[{"id":"10.13039\/100010663","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Asthma is the most common chronic disease among pregnant women. Some studies have linked maternal asthma to an increased risk of congenital malformations, particularly congenital heart defects (CHDs). Among these, ventricular septal defect (VSD) is the most common, accounting for nearly half of all CHD cases. We investigated the association between maternal asthma and the risk of CHD in offspring. As a sensitivity analysis, we also examined the associations between maternal atopic predisposition, maternal use of asthma medication, and CHD risk.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and Methods<\/jats:title><jats:p>This retrospective, population\u2010based study utilized a comprehensive birth cohort of all singleton births in Finland between 1996 and 2018. Data were derived by linking four high\u2010coverage national health registers.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The cohort included 1\u2009274\u2009540 eligible mother\u2013child pairs. A total of 106\u2009544 (8.4%) mothers had a diagnosis of asthma or had purchased asthma medication during pregnancy. Of the offspring, 18\u2009772 (1.5%) were diagnosed with a congenital heart defect (CHD), and 8855 (0.7%) had a diagnosis of ventricular septal defect (VSD). Maternal asthma was weakly associated with overall CHD (OR 1.18; 95% CI, 1.12 to 1.24) and with VSD (OR 1.19; 95% CI, 1.10 to 1.27). The association between maternal asthma and CHD was observed in both allergic asthma (OR 1.33; 95% CI, 1.18 to 1.50) and nonallergic asthma (OR 1.27; 95% CI, 1.04 to 1.56). Maternal allergic conditions, such as atopic dermatitis and allergic rhinitis, were also associated with CHD overall (OR 1.13; 95% CI, 1.02 to 1.25) and with VSD (OR 1.20; 95% CI, 1.04 to 1.38).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Maternal asthma and allergic tendency are associated with a modestly increased risk of CHD in offspring, particularly VSD. Nonallergic asthma was also linked to CHD, especially right\u2010sided defects. These findings suggest that maternal allergic inflammation may have teratogenic effects during fetal cardiac development.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.70032","type":"journal-article","created":{"date-parts":[[2025,8,4]],"date-time":"2025-08-04T06:49:55Z","timestamp":1754290195000},"page":"1849-1858","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Association of maternal asthma with congenital heart defects in offspring"],"prefix":"10.1111","volume":"104","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5680-7394","authenticated-orcid":false,"given":"Mari","family":"Kemppainen","sequence":"first","affiliation":[{"name":"Vantaa and Kerava Wellbeing County, Martinlaakso Health Station  Vantaa Finland"},{"name":"Helsinki University  Helsinki 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