{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T21:42:28Z","timestamp":1776980548373,"version":"3.51.4"},"reference-count":37,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T00:00:00Z","timestamp":1767744000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T00:00:00Z","timestamp":1767744000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp;amp; Gyne"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To determine the risk of pre\u2010eclampsia in ongoing pregnancies according to gestational age. We also studied whether the gestational\u2010age\u2010specific risks of developing pre\u2010eclampsia have changed over recent decades.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This was a population\u2010based study using data from the Medical Birth Registry of Norway. The study population included all singleton pregnancies in Norway delivered between 21 and 43\u2009weeks' gestation during the period 1984\u20132019. We calculated the proportion of pregnancies with pre\u2010eclampsia at each week of gestation. The numerator was the number of pre\u2010eclamptic pregnancies that were delivered during the gestational week being studied, and the denominator included all pregnancies still ongoing at the same gestational week. We analyzed the study period as a whole and subdivided it into four time periods (1984\u20131989, 1990\u20131999, 2000\u20132009 and 2010\u20132019).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>A total of 1\u2009955\u2009082 pregnancies were included, of which 3.2% developed pre\u2010eclampsia. The risk of pre\u2010eclampsia increased with advancing gestational age. The risk per 1000 ongoing pregnancies was 0.2 at 28\u2009weeks, 5.2 at 38\u2009weeks and 13.6 at 42\u2009weeks. The gestational\u2010age\u2010specific risk of developing pre\u2010eclampsia was lower at all gestational ages during the period 2010\u20132019 compared with 2000\u20132009, and the absolute decrease was greatest in term and post\u2010term pregnancies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      The risk of developing pre\u2010eclampsia increased almost exponentially with advancing gestational age. During the last decade of the study period, the risk of pre\u2010eclampsia decreased, particularly in term pregnancies. This decrease may be explained by the use of obstetric interventions to shorten the duration of pregnancy among women at high risk of developing pre\u2010eclampsia. \u00a9 2026 The Author(s).\n                      <jats:italic>Ultrasound in Obstetrics &amp; Gynecology<\/jats:italic>\n                      published by John Wiley &amp; Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/uog.70160","type":"journal-article","created":{"date-parts":[[2026,1,7]],"date-time":"2026-01-07T20:06:22Z","timestamp":1767816382000},"page":"155-161","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Risk of pre\u2010eclampsia according to gestational age across three decades: population\u2010based study"],"prefix":"10.1002","volume":"67","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4708-3267","authenticated-orcid":false,"given":"C.","family":"Haavaldsen","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Akershus University Hospital  L\u00f8renskog Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5199-4269","authenticated-orcid":false,"given":"O.","family":"Thomas","sequence":"additional","affiliation":[{"name":"Health Services Research Unit H\u00d8KH Akershus University Hospital  L\u00f8renskog Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2756-1583","authenticated-orcid":false,"given":"A.","family":"Eskild","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Akershus University Hospital  L\u00f8renskog Norway"},{"name":"Institute of Clinical Medicine University of Oslo  Oslo Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2026,1,7]]},"reference":[{"key":"e_1_2_7_2_1","volume-title":"WHO recommendations for prevention and treatment of pre\u2010eclampsia and eclampsia","year":"2011"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa1704559"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejogrb.2013.05.005"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.preghy.2022.02.001"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1447-0756.2012.01990.x"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-3016.2012.01260.x"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1097\/FM9.0000000000000099"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1067\/S0002-9378(03)00897-4"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-021-03809-2"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/aogs.14489"},{"issue":"10","key":"e_1_2_7_12_1","first-page":"CD004659","article-title":"Antiplatelet agents for preventing pre\u2010eclampsia and its complications","volume":"2019","author":"Duley L","year":"2019","journal-title":"Cochrane Database Syst Rev"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0412.2000.079006435.x"},{"key":"e_1_2_7_14_1","first-page":"17","volume-title":"Perinatal omsorg i Norge: Norwegian official report","author":"Department of Social Affairs","year":"1984"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1177\/14034948010290021001"},{"key":"e_1_2_7_16_1","unstructured":"Directorate for Health and Social Affairs.A National Clinical Guideline for Antenatal Care. 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