1. Successful pregnancy and delivery from frozen-thawed embryos after intracytoplasmic sperm injection using round-headed spermatozoa and assisted oocyte activation in a globozoospermic patient with mosaic down syndrome 
Sung Tae Kim, M.S., Young Beom Cha, Jong Min Park, Myung Chan Gye, Ph.D. 
Fertility and Sterility 
Volume 75, Issue 2, Pages (February 2001)
DOI: /S (00)

2. Figure 1
Transmission electron microscopy of 100% round-headed spermatozoa from a patient with globozoospermia. Magnification, ×10,000.
Kim. Pregnancy from frozen-thawed embryos. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (00) )