{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T18:15:35Z","timestamp":1789755335166,"version":"4.0.1"},"reference-count":11,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2010,12,31]],"date-time":"2010-12-31T00:00:00Z","timestamp":1293753600000},"content-version":"vor","delay-in-days":943,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2008,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:italic>Objective.<\/jats:italic> Preterm and term pre\u2010eclampsia may differ in etiology. This could be reflected in differences in placenta weight. Therefore, we compared placenta weight in pregnancies with preterm or term pre\u2010eclampsia to placenta weight in pregnancies without pre\u2010eclampsia. <jats:italic>Design.<\/jats:italic> Population study. <jats:italic>Setting.<\/jats:italic> Medical Birth Registry of Norway. <jats:italic>Population.<\/jats:italic> All singleton pregnancies in Norway from 1999 through 2004 delivered at or after 21 weeks\u2019 gestation (<jats:italic>n<\/jats:italic> = 317,688). <jats:italic>Methods.<\/jats:italic> Placenta weight in pregnancies without pre\u2010eclampsia (<jats:italic>n<\/jats:italic> = 304,875) was compared to placenta weight in pregnancies with preterm pre\u2010eclampsia (delivery before week 37 of pregnancy, <jats:italic>n<\/jats:italic> = 3,070) and term pre\u2010eclampsia (delivery on or after week 37 of pregnancy, <jats:italic>n<\/jats:italic> = 9,743). Placenta weight <jats:italic>z<\/jats:italic>\u2010scores were calculated to adjust for offspring sex and length of gestation, and grouped in tenths. Placenta weight according to pre\u2010eclampsia status is presented as proportions within each tenth. <jats:italic>Main outcome measures.<\/jats:italic> Pre\u2010eclampsia status. <jats:italic>Results.<\/jats:italic> In preterm pre\u2010eclampsia, placentas were over\u2010represented in the two lowest (33.8%; 95% CI 32.1\u201335.5) and under\u2010represented in the two highest (13.1%; 95% CI 11.9\u201314.3) tenths of placenta weight compared to pregnancies without pre\u2010eclampsia (20%). In term pre\u2010eclampsia, placentas were over\u2010represented in the two lowest (22.0%; 95% CI 21.2\u201322.8) and the two highest (22.7%; 95% CI 21.9\u201323.6) placenta weight groups. Mean placenta weight <jats:italic>z<\/jats:italic>\u2010score was higher in term pre\u2010eclampsia compared to pregnancies without pre\u2010eclampsia. <jats:italic>Conclusions.<\/jats:italic> Small placentas were associated with pre\u2010eclampsia, and more strongly with preterm than term pre\u2010eclampsia. In term pre\u2010eclampsia, the association with placenta weight was u\u2010shaped, yielding higher proportions of both low and high placenta weight compared to pregnancies without pre\u2010eclampsia.<\/jats:p>","DOI":"10.1080\/00016340802056178","type":"journal-article","created":{"date-parts":[[2008,5,12]],"date-time":"2008-05-12T17:04:48Z","timestamp":1210611888000},"page":"608-611","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":82,"title":["Placenta weight in pre\u2010eclampsia"],"prefix":"10.1111","volume":"87","author":[{"given":"BERIT","family":"DAHLSTR\u00d8M","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P\u00c5L","family":"ROMUNDSTAD","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P\u00c5L","family":"\u00d8IAN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"LARS J.","family":"VATTEN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ANNE","family":"ESKILD","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2010,12,31]]},"reference":[{"key":"e_1_2_5_2_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2004.00071.x"},{"key":"e_1_2_5_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(96)70056-X"},{"key":"e_1_2_5_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(00)03577-7"},{"key":"e_1_2_5_5_2","doi-asserted-by":"publisher","DOI":"10.1093\/aje\/155.3.203"},{"key":"e_1_2_5_6_2","doi-asserted-by":"publisher","DOI":"10.1095\/biolreprod.102.014977"},{"key":"e_1_2_5_7_2","doi-asserted-by":"publisher","DOI":"10.1385\/ENDO:19:1:103"},{"key":"e_1_2_5_8_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1111726"},{"key":"e_1_2_5_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2006.10.909"},{"key":"e_1_2_5_10_2","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0412.2000.079006435.x"},{"key":"e_1_2_5_11_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2007.01327.x"},{"key":"e_1_2_5_12_2","doi-asserted-by":"publisher","DOI":"10.1530\/EJE-07-0386"}],"container-title":["Acta Obstetricia et Gynecologica Scandinavica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1080%2F00016340802056178","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1080\/00016340802056178","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,11]],"date-time":"2023-10-11T07:19:56Z","timestamp":1697008796000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1080\/00016340802056178"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,6]]},"references-count":11,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2008,6]]}},"alternative-id":["10.1080\/00016340802056178"],"URL":"https:\/\/doi.org\/10.1080\/00016340802056178","archive":["Portico"],"relation":{},"ISSN":["0001-6349","1600-0412"],"issn-type":[{"value":"0001-6349","type":"print"},{"value":"1600-0412","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,6]]},"assertion":[{"value":"2010-12-31","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}