Speed Expansion Service

Need dozens or hundreds of age-matched mice fast? Speed expansion via IVF rapidly develops mouse colonies at a specified and opportunistic pathogen-free status.

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Using IVF, we routinely produce cohorts of mice that can be used to jump-start a breeding colony or perform characterization studies. This saves months over traditional breeding approaches and requires only a few males to expand the colony.

Speed Expansion

Key benefits

  • Ideal for quickly producing large quantities of same-age, SOPF mice on common genetic backgrounds.
  • Requires only a few males.
  • Uses wild-type females from the appropriate genetic background.
  • Ideal for strains in which males have short lifespan or breeding windows (e.g., neuromuscular and neurological disorders).


  • Experienced using many different inbred lines as oocyte donor strains.
  • Can be used to expand customer colonies or to generate cohorts of JAX® Mice that are only available in limited supply.