how many babies do rats have per litter? 1 to 20 but the average is 8 to 10. if she is young then she will only have a few most of the time and if shes old she wont have a lot of babies eather.
there is no sure answer to how many are born in a year but, there is one born every 1 second.
A female raccoon is sexually mature once it reaches one year of age. They only come into heat once per year and only for three to four days. Mating usually takes place in late winter or early spring.
25,077,985
Jaguars normally kill around 1-3 people every year.
At 15-18 months old, rats average 8 to 10 young per litter and average 5-6 litters per year. In one year, one pair of rats will produce 50-70 offspring that will reach maturity and bear young.
Female rats can have a litter every 3-4 weeks. So that's once every month = 12 times a year.
Every year there can be a different amount of them born at a time.
about 50 million are born every year
3,5 million every year
A lot
i have absolutely no idea
One in 10 thousand babies are born with Dwarfism every year.
There is no accurate answer for this question but all over the world 1 is born every second.
New alligators are born every year. Many people don't believe that, which is why it's called "allegation".
about 1,048 male babies born for every 1,000 female babies born
once every 500,000 births
I don't know how many mice and rats are used in every single country but i do know the statistics for the UK in 2005 and 2004: 1,910,110 mice, 464,727 rats and 37,475 other rodents were used in 2004. In 2005 :1,955,035 mice, 414,335 rats and 40,856 other rodents. I also know an estimated amount of rats and mice used in the USA which is 15-20 million. Animal testing needs to be stopped.