It is not too late to neuter a female cat when she is three years old. Cat sterilization has nothing to do with her age. As long as she is healthy, she can undergo sterilization surgery. Generally, a biochemical test will be done on the cat before the sterilization operation, which can check whether the cat's liver and kidney function are good, because the sterilization operation on female cats is more complicated and the risk is greater than that on male cats. If the cat's body is relatively weak, the liver With poor kidney function, it is easy to be unable to wake up after anesthesia.