Rabbit Gestation Calculator

Rabbit gestation averages 31 days, about a month, with a normal range of roughly 28 to 35 days. This is one of the shortest gestation periods of any common domestic mammal, far shorter than a cat (about 63-67 days) or dog (about 63 days), let alone livestock like goats (150 days) or cattle (283 days).

Kindling Date = Breeding Date + Gestation Length in days. With the default 31-day average, a doe bred on August 16 would be due around September 16 of the same year. This calculator lets you adjust the gestation length between 28 and 35 days since even a few days' difference matters over such a short pregnancy.

Rabbits are induced ovulators, similar to llamas. Rather than releasing an egg on a fixed hormonal cycle, mating itself triggers ovulation roughly 10 hours later. This is one reason rabbits are famously prolific breeders: there is no fixed 'heat' window to miss, and a receptive doe can be bred essentially any time.

Pseudopregnancy (false pregnancy) occurs when ovulation happens, often from mounting by another rabbit or even without mating, but no fertilization occurs. It typically lasts about 17-18 days and can include nesting behavior and fur-pulling that closely mimics a true pregnancy. Because it is shorter than the 28-35 day true gestation window, a doe that appears to 'give up' on nesting behavior around day 17-18 without kindling was likely experiencing a false pregnancy rather than a true one.

Gentle abdominal palpation by an experienced handler can detect developing kits as early as 10-14 days after breeding, felt as small, firm, grape-like shapes. This should be done very gently to avoid injury to the developing kits. Ultrasound, where available, can confirm pregnancy even earlier and more reliably.

Place a nest box, lined with clean bedding, in the doe's cage by around day 27-28 of the 28-35 day gestation window, a few days before the expected kindling date. This gives the doe time to build and fur-line her nest. Setting it up too early risks the doe using it as a litter box instead of a nest; too late risks kits being born on wire flooring.

In the final days, watch for nest-building behavior, fur-pulling from the doe's own chest and belly to line the nest, decreased appetite, and increased restlessness. Kindling itself is usually fast, often taking well under an hour, and very commonly happens overnight or in the early morning hours, so signs are frequently noticed only after the fact.

True pregnancies rarely extend past day 35. If a doe confirmed pregnant (by palpation or prior ultrasound) reaches day 35 without kindling, a veterinary check is strongly recommended, since this can indicate a retained kit, a stuck birth, or other complications that need prompt attention given how short and predictable rabbit gestation normally is.

Litter size varies widely by breed and the individual doe, but commonly ranges from about 4 to 12 kits, with many breeds averaging 6-8. Larger litters do not meaningfully change the gestation length itself, unlike in some other species, but they do mean the doe needs more nest space and monitoring after kindling.

The 28-35 day range above applies to domestic rabbits (Oryctolagus cuniculus). Hares (genus Lepus) are a related but biologically distinct group with a notably longer gestation, commonly cited around 41-42 days, and their young (leverets) are born much more developed than newborn domestic rabbit kits, so that range does not apply to hares.