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To address this gap, we aimed to investigate how maternal age, pre\u2010gestational body mass index (BMI), smoking, parity, ethnic origin and employment status relate to medication use during pregnancy. We conducted a nationwide Danish registry study, including 698\u2009447 clinically recognised pregnancies with a gestational age of at least 10\u2009weeks, spanning from 2008 to 2018. Medication use was estimated based on prescription redemptions during pregnancy and stratified by the demographic factors of interest. Overall, 60.3% of pregnant women redeemed at least one prescription, while 28.9% redeemed multiple medications. Notably, higher usage was observed among women aged 35 or older, those with a BMI of 30\u2009kg\/m<jats:sup>2<\/jats:sup> or more, smokers, multipara, Black women, and early retirees. Medication combination patterns differed with the demographic subgroups. These findings highlight notable differences in medication use among demographic groups during pregnancy, underscoring the need for tailored healthcare strategies during pregnancy.<\/jats:p>","DOI":"10.1111\/bcpt.70020","type":"journal-article","created":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T05:48:23Z","timestamp":1742363303000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Maternal Demographic Patterns in Medication use During Pregnancy: A Nationwide Register Study"],"prefix":"10.1111","volume":"136","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7180-3180","authenticated-orcid":false,"given":"Mette\u00a0\u00d8stergaard","family":"Thunbo","sequence":"first","affiliation":[{"name":"Department of Clinical Medicine Aarhus University  Aarhus Denmark"},{"name":"Department of Clinical Pharmacology Aarhus University Hospital  Aarhus 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