Just wondering has anyone had any of these ilnesses/effects through having theirs spayed or neutered? and has anyones dog had any proven ilnesses through not having them spayed or neutered,

Harvey got enalarged prostate proven to be because he was un-neutered.

Its so confusing knowing what to do for the best we have a 10month old girl our first bitch and was planning to have her spayed at the right time after her first season.