Sperms can be kept frozen till 20 years time period. This will help couples as well as individuals to utilize the quality sperms for their respective infertility treatments to have their own babies. Couples can also opt for result oriented infertility procedures to make sure that they achieve success in the form of positive pregnancies and successful birth of the babies.
Nowadays, gynecologists recommend freezing sperms for a time frame of 5 to 10 years depending on the family planning goals of the respective couple. One of my friends, used his sperms in achieving pregnancy after a period of 8 years. It was very useful for him.