Which advantage does a timed mating system provide?

Which advantage does a timed mating system provide?

• A. It helps avoid fighting among the cage mates.
• B. It can provide embryos or mice at a precise gestational age needed for experiments.
• C. It reduces the number of animals needed for breeding.
• D. It is less expensive than other systems.

Answer: (B)

Timed mating lets you control exactly when mating occurs, so you know the precise time of conception and therefore the gestational age of the embryos or pups. This precise timing is essential for experiments that require a specific developmental stage, such as harvesting embryos at a defined embryonic day, performing embryo transfers, or studying stage-specific biology. By pairing a male and female for a defined window and confirming mating (for example, with a vaginal plug), you can assign an accurate gestational age to each pregnancy and schedule procedures with consistent timing. While other colony-management factors matter, the main advantage here is obtaining embryos or mice at a precise gestational age.

Timed mating lets you control exactly when mating occurs, so you know the precise time of conception and therefore the gestational age of the embryos or pups. This precise timing is essential for experiments that require a specific developmental stage, such as harvesting embryos at a defined embryonic day, performing embryo transfers, or studying stage-specific biology. By pairing a male and female for a defined window and confirming mating (for example, with a vaginal plug), you can assign an accurate gestational age to each pregnancy and schedule procedures with consistent timing. While other colony-management factors matter, the main advantage here is obtaining embryos or mice at a precise gestational age.