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.
When do mice breed? 1  Females reach sexual maturity at 6 to 10 weeks of age. 2  Conception to birth is 19-21 days and mothers can re-mate immediately after giving birth to produce up to 10 litters per year under ideal conditions. 3  Mice can breed at any time if food is available.hen do mice breed? 1  Females reach sexual maturity at 6 to 10 weeks of age. 2  Conception to birth is 19-21 days and mothers can re-mate immediately after giving birth to produce up to 10 litters per year under ideal conditions. 3  Mice can breed at any time if food is available.