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The parameters studied included congenital anomalies and dermatoglyphics (total ridge count and right\u2010left asymmetry). With the exception of total ridge count, analyses of these data failed to reject the null hypothesis. Dichorionic MZ twins had a significantly greater within\u2010pair variation than monochorionic MZ twins for total ridge count. In summary, then, these data could offer little support to prior speculation that monochorial placentas may present less favorable environments for fetal development.<\/jats:p>","DOI":"10.1002\/ajmg.1320040207","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T17:32:32Z","timestamp":1118511152000},"page":"147-156","source":"Crossref","is-referenced-by-count":20,"title":["The effects of chorion type on normal and abnormal developmental variation in monozygous twins"],"prefix":"10.1002","volume":"4","author":[{"given":"Michael","family":"Melnick","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ntinos C.","family":"Myrianthopoulos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,6,2]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1017\/S1120962300022538","article-title":"Delayed ovulation and monozygotic twinning in the rabbit","volume":"23","author":"Bomsel\u2010Helmreich O","year":"1974","journal-title":"Acta Genet Med Gemellol"},{"key":"e_1_2_1_3_2","first-page":"31","volume-title":"The Biology of Twinning in Man","author":"Bulmer MG","year":"1970"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1017\/S0001566000010187"},{"key":"e_1_2_1_5_2","first-page":"178","article-title":"Birthweight in MZ and DZ twins of known placental type. 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