Approximately how many young can a mature female rat give birth to?

• A. 10
• B. 20
• C. 30
• D. 40

Answer: (B)

Rats reproduce very quickly, so a mature female can produce several litters within a year. The gestation period is short (about three weeks), and each litter typically contains roughly 6 to 12 pups. When you combine these factors, a realistic annual total of offspring is around twenty. This high reproductive rate explains how rat populations can rebound rapidly after control efforts, highlighting why effective management focuses on continuously limiting breeding opportunities rather than relying on a single intervention. Options like ten are generally too low given multiple yearly litters, while thirty or forty would require more litters or larger litter sizes than is typical.