It depends upon when you had capsular contracture. If its quite late in the lifespan of your implants (10 years or so) then this may well simply be the natural progression and you are likely to have a similar outcome next time - probably out at 10 years.
If you had capsular contracture early, within 5 years, then it depends whether there was anything that was adverse in the healing process - infections, bleeding etc. If this can be corrected next time then you may be able to avoid early contracture but in reality we don't know for sure what causes capsular contracture and, therefore, how to stop it.
If you have smooth implants, of course, your capsular contracture rate is much higher than with textured - but with textured you need to have a conversation with your surgeon about Lymphoma...
Pregnancy has nothing to do with it but you would not want to be breast feeding after a breast operation!