Apple Inc. is an American multinational technology company headquartered in Cupertino, California, that designs, develops, and sells consumer electronics, computer software, and online services.
Generally, laboratory mice become sexually mature between fi ve and eight weeks of age. Males of most. strains usually mature sexually by six weeks of age. DBA/2J (000671) and C3H/HeJ (000659) mice are precocious: females can. conceive when they are as young as 23 days old.
Breeding Age: Female rats can get pregnant very young. Its best never to keep males and females together past the age of 6 weeks. Best breeding age should be based on the size of the female: As long as the female is sufficiently grown, 4 months at the earliest with 6  7 being optimal. Females in good health and body structure can be as bred as late as 10 months and later depending on the genetic line. If you are not familiar with the line you are breeding, it might be best to breed the doe earlier. Male rats are generally good breeders at the age of three months.