Studies have shown that cat desexing can help to minimise aggression, but this isn’t a guarantee. What is guaranteed is that female cats that have been desexed won’t go into heat (occurring repeatedly throughout the breeding season, this typically results in lots of urinating and yowling). Male cats that have been desexed are also less likely to mark their territory by spraying and aren’t as prone to roaming far from home (a habit which often leads to fights over territory and an increased risk of being injured in an accident).