04 / Planner · Probabilistic

Breeding Calculator

How many breeding pairs to set up for a target cohort — accounting for fertility, litter size, and Mendelian genotype frequency.

Animals needed

Sex needed

Genotype frequency

Strain

Avg litter

Fertility %

Confidence level

Birth-synchrony window

Effective fertility used: 80%

You need approximately

13 breeding pairs

to get ≥12 mice at ≥90% confidence.

Confidence achieved —

Pups born ≈ —

Usable ≈ —

Surplus ≈ —

3Rs reminder: The estimate already discounts for fertility & genotype losses. Round up modestly — over-breeding wastes animals.

Model after Milchevskaya et al. 2023 (UZH LTK).