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Placental localization was important: fetal losses were 8 per cent when the placenta was strictly posterior (transamniotic route), whereas it was only 1\u00b76 per cent when it was not posterior. Moreover, all fetal losses occurred (apart from one at 12\u00b75 weeks of amenorrhea) before the 12th week of amenorrhea. The authors suggest that choriocentesis by the transabdominal route should not be performed before the 12th week of amenorrhea, and that the amniotic membrane should not be disturbed before the 13th week of amenorrhea.<\/jats:p>","DOI":"10.1002\/pd.1970100708","type":"journal-article","created":{"date-parts":[[2007,3,4]],"date-time":"2007-03-04T04:08:15Z","timestamp":1172981295000},"page":"461-467","source":"Crossref","is-referenced-by-count":16,"title":["Risks of transabdominal chorionic villus sampling before the 12th week of amenorrhea"],"prefix":"10.1002","volume":"10","author":[{"given":"R.","family":"Saura","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Longy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Horovitz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"O.","family":"Grison","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Vergnaud","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"Taine","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.","family":"Maugey","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,11,21]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.169.3.3055033"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(87)80363-0"},{"key":"e_1_2_1_4_1","first-page":"6","article-title":"Multicentre randomized clinical trial of chorion villus sampling and amniocentesis","volume":"1","author":"Canadian Collaborative CVS\u2010Amniocentesis Clinical Trial Group","year":"1989","journal-title":"Lancet"},{"key":"e_1_2_1_5_1","first-page":"2638","article-title":"Sur une nouvelle technique d'analyse du caryotype humain","volume":"272","author":"Dutrillaux B.","year":"1971","journal-title":"C. 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Pr\u00e9l\u00e8vements ovulaires et diagnostic pr\u00e9natal daberrations chromosomiques Livre des S\u00e8me Journ\u00e9es de Techniques A vanc\u00e9es en Gyn\u00e9cologie\u2010Obst\u00e9trique et Perinatologie(Fort de France January1990 in press)."},{"key":"e_1_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00274761"},{"key":"e_1_2_1_19_1","doi-asserted-by":"publisher","DOI":"10.1002\/pd.1970070911"},{"key":"e_1_2_1_20_1","doi-asserted-by":"publisher","DOI":"10.1002\/pd.1970040302"},{"key":"e_1_2_1_21_1","doi-asserted-by":"publisher","DOI":"10.1002\/pd.1970060208"},{"key":"e_1_2_1_22_1","first-page":"535","article-title":"Transabdominal chorionic villi sampling for fetal genetic diagnosis. Obstetrical evaluation of 100 cases","volume":"7","author":"Smidt\u2010Jensen S.","year":"1987","journal-title":"Prenat. 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