{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,21]],"date-time":"2026-01-21T08:34:10Z","timestamp":1768984450145,"version":"3.49.0"},"reference-count":24,"publisher":"Wiley","issue":"S44","license":[{"start":{"date-parts":[[2011,1,12]],"date-time":"2011-01-12T00:00:00Z","timestamp":1294790400000},"content-version":"vor","delay-in-days":13160,"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":[[1975,1]]},"abstract":"<jats:p><jats:bold>Abstract. <\/jats:bold> The neonatal morbidity and mortality rate of 335 twin pairs born during the years 1965\u20101973 was investigated.<\/jats:p><jats:p>649 twins were born alive. 29 % of the twins were preterm. 31 % of the twins were small for date infants, and 41% weighed less than 2 500 g. Mean birth weight was 2 590 g in A twins and 2 560 g in B twins. The neonatal mortality (0\u2010 28 days) was 7.1%. The most common causes of death were the respiratory distress syndrome, intracranial haemorrhage and anoxia.<\/jats:p><jats:p>Low one minute Apgar scores occurred more often in B twins than among A twins. Breech delivery gave low one minute Apgar scores more often than did spontaneous vertex delivery in both twins. Full term twins and infants weighing more than 2 500 g had fewer low one minute Apgar scores than the preterm infants and those with low birth weight.<\/jats:p><jats:p>Neonatal disorders were equally common in both twins except the birth asphyxia and\/or aspiration syndrome, which were more frequent in the B twins. The respiratory distress syndrome was diagnosed in 8 % of A twins and 12% of B twins. Hypoglycaemia was recorded for 8%, and hyperbilirubinaemia exceeding 15 mg% for 7 %. Infections occurred in 6%. Transfusion syndrome was verified in 7% and malformations in 6%.<\/jats:p><jats:p>Although mortality in twin pregnancies has declined, neonatal morbidity is very high. Twin pregnancies thus form a high risk group for obstetricians and pediatricians.<\/jats:p>","DOI":"10.3109\/00016347509156426","type":"journal-article","created":{"date-parts":[[2009,12,8]],"date-time":"2009-12-08T18:08:00Z","timestamp":1260295680000},"page":"21-29","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["Twin Pregnancy: Neonatal Morbidity and Mortality"],"prefix":"10.1111","volume":"54","author":[{"given":"M.","family":"KOIVISTO","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"JOUPPILA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"KAUPPILA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"MOILANEN","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"O.","family":"YLIKORKALA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,1,12]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"27","article-title":"Evaluation of newborn infant","volume":"5","author":"Ahvenainen E K.","year":"1959","journal-title":"Ann Paediatr Fenn"},{"key":"e_1_2_1_3_1","first-page":"327","article-title":"Growth and development of twins of dissimilar size at birth","volume":"33","author":"Babson S G.","year":"1964","journal-title":"Pediatrics"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1136\/adc.36.185.1"},{"key":"e_1_2_1_5_1","first-page":"426","article-title":"Zwillings\u2010schwangersahaft und perinatale Mortalit\u00e4t","volume":"94","author":"Eckert N.","year":"1972","journal-title":"Zentralbl Gynaekol"},{"key":"e_1_2_1_6_1","first-page":"260","article-title":"Fetal mortality in twin deliveries a 10 year survey","volume":"79","author":"Friedman S.","year":"1970","journal-title":"Harefuah"},{"key":"e_1_2_1_7_1","first-page":"1290","article-title":"Perinatale Mortalit\u00e4t und Zwillingsschwangerschaft","volume":"65","author":"Hagen P.","year":"1970","journal-title":"Z Aertzl Fort-bild"},{"key":"e_1_2_1_8_1","first-page":"17","article-title":"Studien zur intrauterinen Dystrophie. 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