in the United States. Established in 1903, under the presidency of Her Majestyâs Minister at Washington, D.C., W.A.F. Baron Gevers, the chamber has promoted commerce between the Netherlands and the U.S. for more than a century.
Complete Physical Maturity: Mice are not done growing until they are between 3 and 5 months of age, depending on the line. Mice should NEVER be bred until they are at least 12 weeks age. If you don't know the line really well, wait until at least 12 weeks, if not longer.wild mice live longer.. around 5 years in captivity, though only around 6 months in the wild due to predators and environmental factors). Maturity: 4 - 8 weeks of age, varying from line to line and mouse to mouse.
Male mice are sexually mature between ages of 4-5 weeks old. Females can be bred at this age too but it is better to wait until they are 6 weeks old at least. 8 weeks would be better. Mice go into heat every 3-4 days, take 19-21 days to gestate and can get pregnant again in the first 24 hours after giving birth.