{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T08:07:24Z","timestamp":1771488444148,"version":"3.50.1"},"reference-count":13,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[2014,8,1]],"date-time":"2014-08-01T00:00:00Z","timestamp":1406851200000},"content-version":"unspecified","delay-in-days":8523,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta genet. med. gemellol.: twin res."],"published-print":{"date-parts":[[1991,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The usual assumption that monochorionic twins are monozygotic has recently been questioned, based on blood group discordance in 3 of 12 monochorionic pairs. Therefore, this study evaluates the validity of zygosity diagnosis based on examination of placental membranes, and at the same time evaluates Weinberg's differential rule in a Danish consecutive twin series. All twin pairs, 265 like-sexed and 87 unlike-sexed pairs, born at Odense University Hospital, Denmark, from 1 January 1980 through 31 August 1988, were ascertained. In 229 like-sexed pairs, zygosity was determined by serological methods, and in 190 of these, the fetal membranes could be reliably classified. Fiftynine monochorionic twin pairs were identified and none of those pairs were discordant for any genetic markers. Therefore, we conclude that monochorionic twins can be considered monozygotic. The distribution of monozygotic and dizygotic pairs was in accordance with Weinberg's rule.<\/jats:p>","DOI":"10.1017\/s0001566000002579","type":"journal-article","created":{"date-parts":[[2016,7,27]],"date-time":"2016-07-27T10:01:27Z","timestamp":1469613687000},"page":"147-152","source":"Crossref","is-referenced-by-count":22,"title":["Zygosity, Placental Membranes and Weinberg's Rule in a Danish Consecutive Twin Series"],"prefix":"10.1017","volume":"40","author":[{"given":"H.","family":"Husby","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"N.V.","family":"Holm","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Gernow","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.G.","family":"Thomsen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"Kock","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"G\u00fcrtler","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2014,8,1]]},"reference":[{"key":"S0001566000002579_ref003","doi-asserted-by":"publisher","DOI":"10.1017\/S0001566000013775"},{"key":"S0001566000002579_ref004","unstructured":"Vital Statistics 1985. K\u00f8benhavn 1987: Danmarks Statistik."},{"key":"S0001566000002579_ref012","volume-title":"Principles of Human Genetics","author":"Stern","year":"1973"},{"key":"S0001566000002579_ref002","volume-title":"The Biology of Twinning in Man","author":"Bulmer","year":"1970"},{"key":"S0001566000002579_ref011","first-page":"621","article-title":"Unusual monochorionic placentation with heterosexual twins","volume":"36","author":"Nylander","year":"1970","journal-title":"Obstet Gynecol"},{"key":"S0001566000002579_ref008","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1056\/NEJM198407053110122","article-title":"Twins","volume":"311","author":"James","year":"1984","journal-title":"N Engl J Med"},{"key":"S0001566000002579_ref005","volume-title":"Pathology of the Placenta","author":"Fox","year":"1978"},{"key":"S0001566000002579_ref001","doi-asserted-by":"publisher","DOI":"10.1126\/science.7196086"},{"key":"S0001566000002579_ref007","doi-asserted-by":"publisher","DOI":"10.1017\/S0001566000009363"},{"key":"S0001566000002579_ref006","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM198402163100706"},{"key":"S0001566000002579_ref010","doi-asserted-by":"publisher","DOI":"10.1017\/S0001566000006188"},{"key":"S0001566000002579_ref013","doi-asserted-by":"publisher","DOI":"10.1017\/S0001566000004049"},{"key":"S0001566000002579_ref009","first-page":"9","article-title":"Twin placentation and its complications","volume":"10","author":"Johnson","year":"1986","journal-title":"Semin Perinatol"}],"container-title":["Acta geneticae medicae et gemellologiae: twin research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0001566000002579","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,17]],"date-time":"2019-05-17T22:08:59Z","timestamp":1558130939000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0001566000002579\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1991,4]]},"references-count":13,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1991,4]]}},"alternative-id":["S0001566000002579"],"URL":"https:\/\/doi.org\/10.1017\/s0001566000002579","relation":{},"ISSN":["0001-5660","2059-6324"],"issn-type":[{"value":"0001-5660","type":"print"},{"value":"2059-6324","type":"electronic"}],"subject":[],"published":{"date-parts":[[1991,4]]}}}