Butter will keep for a long time refrigerated. Up to 6 weeks. You can also freeze this product and it will keep for over a year.   Hi - I only accessed this question as I hâ¦ave just tried some butter I had in the fridge. It is now Sunday 14th June 2009.
Sperm can be stored inside the male body for approximately 3 weeks after they've matured, after which they die inside the body if not ejaculated. So the entire sperm life cycle inside a man's body if not ejaculated (10 week maturation time + 3 week storage lifespan) is approximately 13 weeks or about 3 months.
What is sperm freezing and storage? Sperm can be frozen for future use either in artificial insemination or other fertility treatments, or be donated. Donated sperm has to be stored for six months before it can be used in treatment, in order to screen the donor for infections. Sperm cells have been frozen, thawed and successfully used in treatment for more than 40 years, although not all sperm survive the freezing process.