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.
Sperm is the male reproductive cell. Sperm production takes about 49 days (7 weeks) in rams. Testicle size is a good indication of a ram's sperm-producing ability. Palpation of the epididymis is a useful guide for determining sperm reserves. A large, firm tail is indicative of good reserves whereas a small, soft tail would indicate the opposite.