{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T12:32:45Z","timestamp":1788870765057,"version":"build-2803163510"},"reference-count":24,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2003,3,14]],"date-time":"2003-03-14T00:00:00Z","timestamp":1047600000000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100006310","name":"Swedish Medical Research Council","doi-asserted-by":"crossref","award":["5980"],"award-info":[{"award-number":["5980"]}],"id":[{"id":"10.13039\/501100006310","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100009780","name":"Region Sk\u00e5ne","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100009780","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Sydv\u00e4stra Sk\u00e5nes sjukv\u00e5rdsdistrikt"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2003,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>Skewed gender distribution and falsely assigned gestational age lead to unnecessary or late obstetric intervention in prolonged pregnancy. The aim of this study was to examine the consequences of a fetal gender\u2010dependent systematic 1.5\u2010day dating error at ultrasound fetometry.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and methods<\/jats:title>\n                    <jats:p>A total of 82 484 singleton deliveries \u226537 weeks at 11 hospitals in southern Sweden from 1995 to 2000 were included. Frequencies of labor induction and Apgar scores &lt;7 at 5 min were compared with regard to fetal gender, both before and after correction of gestational age by adding 0.75 days to female\u2010fetus pregnancies and subtracting 0.75 days from male\u2010fetus pregnancies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The uncorrected odds ratio for having a male baby at \u226542 weeks was 1.41 (95% confidence interval, 1.33\u20131.49). After adjusting gestational age by \u00b10.75 days, the odds ratio reduced to 0.90 (95% confidence interval, 0.84\u20130.95). The risk for labor induction was significantly above unity in male\u2010fetus pregnancies delivered after 41 weeks when gestational age was corrected for fetal gender, while the risk for female fetuses having a low Apgar score was not significantly increased compared to male fetuses (\n                      <jats:italic>P<\/jats:italic>\n                      = 0.087).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Skewed gender distribution in prolonged pregnancy results in a higher rate of labor induction in pregnancies with male fetuses at \u226541 weeks, and the risk for newborn females having a low Apgar score in prolonged pregnancy is not significantly increased compared to boys. Copyright \u00a9 2003 ISUOG. Published by John Wiley &amp; Sons, Ltd.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/uog.67","type":"journal-article","created":{"date-parts":[[2003,3,24]],"date-time":"2003-03-24T09:58:42Z","timestamp":1048499922000},"page":"262-266","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Skewed fetal gender distribution in prolonged pregnancy: a fallacy with consequences"],"prefix":"10.1002","volume":"21","author":[{"given":"M.","family":"Kitlinski Laczna","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"K\u00e4ll\u00e9n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Mars\u0306\u00e1l","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Olofsson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2003,3,14]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(98)70482-X"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1988.tb06863.x"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1097\/00001648-199509000-00012"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1017\/S0965539597000090"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1995.06050353.x"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1998.11020099.x"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.2002.00855.x"},{"issue":"164","key":"e_1_2_6_9_2","first-page":"37","article-title":"A regional perinatal database in southern Sweden\u2014a basis for quality assurance in obstetrics and neonatology","volume":"76","author":"Molin J","year":"1997","journal-title":"Acta Obstet Gynecol Scand"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.3109\/00016348609158374"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.1968.tb00161.x"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.3109\/00016348209156952"},{"key":"e_1_2_6_13_2","doi-asserted-by":"crossref","first-page":"540","DOI":"10.1016\/0002-9378(81)90514-7","article-title":"Assessment of gestational age in the second trimester by real\u2010time ultrasound measurement of the femur length","volume":"139","author":"O'Brian GD","year":"1981","journal-title":"Am J Obstet Gynecol"},{"key":"e_1_2_6_14_2","first-page":"719","article-title":"Statistical aspects of the analyses of data from retrospective studies of disease","volume":"22","author":"Mantel N","year":"1959","journal-title":"J Natl Cancer Inst"},{"key":"e_1_2_6_15_2","first-page":"515","article-title":"Simple interval estimation of risk ratio","volume":"100","author":"Miettinen OS","year":"1974","journal-title":"Am J Epidemiol"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.3109\/00016347809162697"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1991.01010040.x"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.3109\/00016349609054690"},{"key":"e_1_2_6_19_2","unstructured":"CrowleyP. 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