09/06/2026
when a female rabbit’s body thinks it is pregnant even though it is not, causing her to act and feel completely pregnant due to a temporary surge in hormones.Here is a simple explanation of how this happens and what terms like the corpus luteum mean.1. The Trigger (Ovulation)Rabbits do not have a regular monthly cycle like humans. Instead, a female rabbit releases eggs (ovulates) only after she mates with a male, or if she gets overly excited by interacting with another rabbit, a toy, or even human handling.2. The Corpus Luteum (The Hormone Factory)Once an egg is released, the empty spot left behind on the rabbit's o***y transforms into a temporary, tiny gland.This gland is called the corpus luteum (which means "yellow body" in Latin).Its only job is to pump out a hormone called progesterone.3. The Progesterone Surge (The "Pregnancy" Signal)Progesterone is the "pregnancy hormone." It tells the rabbit's body to prepare for babies.In a true pregnancy, the babies send signals to keep the corpus luteum alive, keeping progesterone levels high for about 31 days until birth.In a false pregnancy, there are no babies to send signals, but the corpus luteum keeps working anyway. It pumps out progesterone for about 16 to 18 days before it finally realizes there are no babies and stops.4. The False Pregnancy BehaviorsDuring those 16 to 18 days, the high progesterone levels cause a temporary hormonal imbalance. This tricks the rabbit into doing things like:Nest building: Plucking fur from her own chest and gathering hay to make a nest.Territorial aggression: Growling or biting to protect her cage or nest.Milk production: Her mammary glands swell up and may produce real milk.5. How It EndsAround day 18, the corpus luteum naturally shrinks and stops making progesterone. The hormone levels drop back to normal, the false pregnancy ends, and her behavior goes back to normal.✅ Summary of TermsFalse Pregnancy: When a rabbit's body behaves as if it is pregnant for about 18 days without any actual babies.Corpus Luteum: A temporary gland that grows on the o***y right after an egg is released to produce pregnancy hormones.Progesterone: The specific hormone that tricks the rabbit's brain and body into acting pregnant.