Sperm freezing is a helpful method for Chinese men with cancer to preserve their fertility before treatment. A study looked at 130 patients who froze their sperm between 1995 and 2012 in Hong Kong. Most patients were young and single, with testicular cancer being the most common type. Out of 125 men who froze sperm, 110 were successful. After cancer treatment, some men had lower sperm quality, but a few were still able to use their frozen sperm for IVF, resulting in successful pregnancies. The study suggests that sperm freezing is a simple and effective way to protect male fertility during cancer treatment, but it is not used as often as it could be.