Reproduction

Gestation wheel

Estimate due date, expected birthing window, and gestation progress from a breeding, ovulation, or conception reference date. Educational planning support only.

Gestation varies by species and individual. Use imaging, reproductive history, and veterinary assessment for clinical decisions.

Educational support only. Date ranges are approximate.
Safety checks
  • Due dates are estimates and normal ranges overlap abnormal presentations.
  • Species, breed, litter size, ovulation timing, and records affect accuracy.
  • Do not use this calculator to diagnose dystocia or pregnancy complications.
Basis and limits
  • Defaults: dog 63 days, cat 65 days, mare 340 days, cow 283 days.
  • Windows: dog roughly 58-68 days, cat 63-67 days, mare 320-360 days, cow 279-287 days.
  • Scope: planning support only; individual variation can be clinically important.
Formula audit trail

Calculation steps will appear here for verification.

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