info on 46xx/-20 isochromosone 20q, mri of fetuses

[robert.e.o'brien]

I would appreciate any information on the effects of an abnormal
chromosone 20 (46xx/-20 isochromosone 20q - 3 longs and one sort,
mosaic isochrmosone 20q).

Also, I would appreciate any info on the use of magnetic resonance 
imaging of fetuses to detect birth defects.

Sorry if this is cross-posted too widely.

Bob O'Brien