A Frequent Cycle
Female rabbits, also known as does, are in season, or "in heat," every 4-5 days for about 24 hours throughout their reproductive life, which is typically 1-2 years.
Breakdown
Ovulation: Unlike most mammals, female rabbits are induced ovulators. This means they only release eggs when they mate.
Heat cycle: They do not have a specific "heat" period like other animals, but their reproductive system is ready to ovulate roughly every 4-5 days for about 24 hours.
Fertility: If a doe mates during this time, she will become pregnant.
It is important to note that these are general timelines and individual rabbits can vary.