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Abortus 
Chromosomal Abnormalities 
Denny Suwanto
Chromosome Abnormalities 
 Numerical 
 Euploid---multiple of haploid number (N) 
 Aneuploid---trisomy or monosomy 
 Structural 
Milward,K. 2001. Genetics Disease
Nondisjunction Meiosis
Chromosome Numeric Anomalies 
Aneuplody 
Trisomy 21
Euplody 
 69,XXX 
 Dyandric 
 Dygynic
Structural Abnormalities
Chromosomal findings in early miscarriages 
40% apparently normal 
60% abnormal: 
Trisomy (47 chromosomes  one extra) 30% 
45,X (45 chromosomes  one missing) 10% 
Triploidy (69 chromosomes  three sets) 10% 
Tetraploidy (92 chromosomes  four sets) 5% 
Other chromosome anomalies 5% 
(e.g. structural anomalies) 
National Genetics Education and Development centre, 2009
Effect of Chromosomal Abnormalities 
 Preimplantation  Implantation Losses 
 Simpson, J, Carson, S, Glob. libr. women's med., 
(ISSN: 1756-2228) 2013; DOI 10.3843/GLOWM.10319

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