A cat can get pregnant again as soon as 1 to 2 weeks after giving birth if she mates during her first post-birth heat cycle. This means a cat can become pregnant just a few weeks after delivering her previous litter. However, it is generally recommended to keep a nursing cat away from male cats and allow her some time to recover before another pregnancy, ideally a few months after giving birth. This recovery period helps the cat regain strength and provide proper care for her current litter.