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Table 1 Distribution of chromosomal abnormalities with respect to risk factors (n = 125)

From: Prenatal screening of cytogenetic anomalies – a Western Indian experience

Sample

Numerical

Structural anomalies

Robertsonian translocation

Reciprocal translocation

sSMC

Isochromosome

Deletions

Inversion Y

Variant

amniotic fluid (n = 93)

        

AMA

5

-

2

2

-

1

2

1

TMS positive

23

3

2

-

-

1

2

4

soft marker positive

17

1

3

-

-

-

-

6

H/O of genetic disease

4

2

2

4

-

-

1

5

chorion (n = 29)

        

AMA

1

-

1

-

1

-

1

-

TMS positive

10

-

1

-

-

-

-

2

soft marker positive

4

-

-

-

-

-

-

-

H/O of genetic disorder

2

2

1

-

-

-

-

3

cord blood (n = 3)

        

AMA

-

-

-

-

-

-

-

-

TMS positive

1

-

-

-

-

-

-

1

soft marker positive

1

-

-

-

-

 

-

-

H/O of genetic disease

-

-

-

-

-

-

-

-

  1. AMA = advanced maternal age; H/O = history of; TMS = triple marker study.