Regency is used to refer to the period in Britain at the beginning of the nineteenth century, and to the style of architecture, literature, and furniture that was popular at the time. ...a huge, six-bedroomed Regency house. ...the Regency period.
I've heard an average of about 12 years. Heredity and diet can make a big difference. I had a yellow lab who died pretty suddenly at 10, but I know someone with a lab that is 18 years old. My current black lab is a rescue, so I don't know his age.
Like they said, every lab is different. I work in a good sized hospital lab. Depending on the test, we can keep a urine for 2 weeks. Urinalysis urines are kept for 24 hours and those with chemisty tests such as drug screens, creatinine levels, sodiums are kept for 2 weeks.