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.
Mice *can* get pregnant as early as 4 weeks. However, it is unbelievably hard on them if they do. Never breed your mouse that young, no matter what. In addition, make sure you separate your babies (males from females) at 4 weeks of age so this doesn't happen.It is generally recommended to wait until the female is 12 weeks old or older before she is bred for her first litter.ever breed your mouse that young, no matter what. In addition, make sure you separate your babies (males from females) at 4 weeks of age so this doesn't happen. It is generally recommended to wait until the female is 12 weeks old or older before she is bred for her first litter.