Hey there, great questions. Sperm has been frozen for 40+ years and then thawed with no issues. In fact, scientists believe you can freeze sperm indefinitely with no loss in quality.
That said, when you are going through the thawing process, you will lose about 50% of the frozen sperm. That's why we do a post-thaw count and motility check 24 hours after freezing, to make sure we know exactly how much of your frozen sperm you'll be able to use in the future.
By the way - if you are going the IVF/ICSI route in the future, of all the sperm you've frozen, you really only need one healthy sperm per attempt, as the sperm is injected directly into the egg. This is the latest technology in sperm and is very commonly used nowadays.
That said, when you are going through the thawing process, you will lose about 50% of the frozen sperm. That's why we do a post-thaw count and motility check 24 hours after freezing, to make sure we know exactly how much of your frozen sperm you'll be able to use in the future.
By the way - if you are going the IVF/ICSI route in the future, of all the sperm you've frozen, you really only need one healthy sperm per attempt, as the sperm is injected directly into the egg. This is the latest technology in sperm and is very commonly used nowadays.