Due to regulations sperm most be frozen for at least 6 months so there is a question as to how well a man’s sperm will react to that freezing and thawing process. Sperm samples vary in the amount of motile sperm that will survive the thaw. Sperm banks interpret these figures differently so be carefully when you purchase sperm from a sperm bank that the motility level you are purchasing is pre-thaw or post thaw.
Sperm Motility Analysis
Post thaw numbers will always be lower than pre-thaw numbers because some sperm die during the freezing/thawing process so if one bank is selling pre-thaw 20% motility and one is selling 20% post thaw motility for the same price buy the post-thaw as you know that figure includes those sperm that have dies and that is the good sperm you are left with.
Related Articles:
Sperm Bank Donors
Choosing your sperm bank donor
Motile Sperm Pre Thaw and Post Thaw
How many children is a donor allowed to conceive?