Is immuno-castration an alternative to castration of piglets?

Immuno-castration is a legally accepted method in the European Union. In itself this is an alternative to castration. However, respecting the integrity of the animal and leaving behind any interventions on the animal is preferred by many parties. In a number of situations, however, immune-castration can be a good (intermediate) solution. This concerns pigs slaughtered at a very high weight and age and animals in organic and free-range housing systems.