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Two mice of opposite sex mate and 20 days later get 10 kids

Within 12 hours after giving birth, the female can get pregnant again.

It is normal for mice to have 5-6 litters a year, but I suppose theoretically up to 17-18 litters can be produced by a supermum.

The pups get fertile after at most 50 days and can then have their own litters.

In less than a single year two mice can become (If no predators eat them)

Day 001, 2

Day 021, 2+10

Day 041, 2+10+10

Day 061, 2+10+10+10

Day 081, 2+10+10+10+10+50

Day 101, 2+10+10+10+10+10+50+50

Day 121, 2+10+10+10+10+10+10+50+50+50

Day 141, 2+10+10+10+10+10+10+10+50+50+50+50+250

Day 161, 2+10+10+10+10+10+10+10+10+50+50+50+50+50+250+250

Day 181, 2+10+10+10+10+10+10+10+10+10+50+50+50+50+50+50+250+250+250

Day 201, 2+10+10+10+10+10+10+10+10+10+10+50+50+50+50+50+50+50+250+250+250+250+1250

My oh my.... If all survives and have enough food, and in ideal conditions have a litter as often as theoretically possible, 2 mice can become a large inbred family of more than 2.000 individuals only after 200-210 days.

As you can see on the above chart of days, the development is exponentional.

Mice, Rats, Rabbits, Pigs, all have a very steep curve of how many they can become under ideal condition in very short time.

Pigs take longer to get mature, but litters are large and ideal conditions still mean a very large family within short time.

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15y ago

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