Fig. 2
From: Sperm chromosomal abnormalities in infertile men with failed intracytoplasmic sperm injection (ICSI)
Sperm FISH images using dual color probes for chromosomes 13 and 21 showing a Normal spermatozoa with one green signal for chromosome 13 and one red signal for chromosome 21. b Abnormal spermatozoa with one red signal for chromosome 21 and no green signal for chromosome 13 (nullisomy 13). c Abnormal spermatozoa with three green signals for chromosome 13(trisomy 13) and two red signals for chromosome 21 (disomy 21). d Abnormal spermatozoa with four green signals for chromosome 13 (tetrasomy 13) and two red signals for chromosome 21 (disomy 21)