1. Intracytoplasmic sperm injection could minimize the incidence of prematurely condensed human sperm chromosomes 
Sai Ma, Ph.D., Basil Ho Yuen 
Fertility and Sterility 
Volume 75, Issue 6, Pages (June 2001)
DOI: /S (01)01799-X

2. Figure 1
Human oocytes after ICSI showing various degrees of sperm nuclei condensation and signs of premature sperm chromosome condensation (A–D). (A), A decondensing sperm head; (B), PCCs with single-stranded elements reach out of the chromatin mass; (C), PCCs in midprophase of G-1; (D), MII oocyte chromosomes with separated chromatids together with PCCs (in late prophase of G-1) after ICSI.
Ma. ICSI could reduce the incidence of PCCs. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01)01799-X)