The incubation period for rat pregnancies typically lasts about 21 to 23 days. After this period, a female rat will give birth to a litter of pups, which can range from 6 to 12 young, although larger litters are possible. After birth, the pups are altricial, meaning they are born hairless, blind, and completely dependent on their mother.
10wks
12 hours
1-4 Days
98 monthes
12 hours
about a week
7 Days
Hairless rats live as long as normal rats do; 2-3 years with proper care.
The word "incubation" directly refers to the time an egg needs to be kept warm before it hatches. Since cows do not lay eggs, they do not have an incubation period. They have what is called a "gestation" period. This gestation period is generally 285 days long.
4 - 8 weeks
6 months
It takes about 11 months.