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High-Frequency Hydroacoustic Monitoring in an Underground Iron Mine

✍ Scribed by Séverine Bernardie; Jean-Pascal Gilbert; François Lebert; Hubert Fabriol

Publisher
Springer
Year
2007
Tongue
English
Weight
494 KB
Volume
164
Category
Article
ISSN
0033-4533

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In 229 pregnancies monitored because of advance maternal age, 16 (7%) abnormal fetal karyotypes were detected. We found 13 cases of trisomy 21, twice a trisomy 18, and once an additional marker chromosome. The frequency of abnormal fetal karyotypes in different maternal age groups was found to incre