Diagnosing a chimera is particularly difficult due to the random distribution of 46,XX and 46,XY cells within the body. An organ might be made up of a mix of 46,XX and 46,XY, but it may also be made up entirely of one genotype only. When that is the case, no abnormalities are noted and other types of tissues need to be analyzed. Pre-birth testing # Ultrasound - looking for ambiguous genitalia # Amniocentesis - looking for a karyotype of<unk>  # Cord blood sampling - looking for a karyotype of<unk>  Post-birth testing # Blood testing - looking for red blood cells of different blood types # Tissue sampling - looking for more than one set of DNA within the sample
46,XX/46,XY
45,X/46,XY mosaicism
T-47D
714-X
Distal 18q-
Dup15q
DXY.cn
XX gonadal dysgenesis