Question: mice are considered neonates at ages?
Answer: Adult mouse - A mouse 8 weeks to 2 years old, with the day of birth defined as day 0. Aged mouse - A mouse 2 to 3 years old. Mature mouse - A mouse 3 to 6 months old, with the day of birth defined as day 0. Middle adult mouse - A mouse 10 to 14 months old, with the day of birth defined as day 0.