pls also read all the comments on this question asked by another new mom - http://app.babychakra.com/question/37426

It is advisable to use both breasts as one will become heavier due to activity while the other will be lighter due to inactivity. This physical difference will be visible in the long run also. You could also consider expressing on the side that baby is not latching to keep them equally active.

@636df5bb3f31520016a58177