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Cytogenetic analysis of 570 first trimester chorionic villi samplings: technique and results. 1988
M Jotterand-Bellomo, and
G Pescia, and
H Nguyen The, and
A C Gaide, and
F Thonney, and
P Marguerat, and
F Pacaud, and
F Munier
Division autonome de génétique médicale, Centre Hospitalier Universitaire Vaudois, Lausanne, Chuv, Switzerland.
In this report we present our experience based on 570 chorionic villi samplings performed by the transcervical method at 8 to 12 weeks gestation. Cytogenetic results were obtained for 551 samples, hence a failure rate of 3.33%. The previously described technique was modified by prolonging the incubation period to 48 hours. The total number of abnormalities was 26, which represents 4.71% of our sample. Of 24 chromosomal abnormalities, 21 were unbalanced and 3 were balanced of parental origin. Five discordant cases are thoroughly discussed.
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