Hello! Thank you for your question. This is an excellent question, and one very common for those seeking rejuvenation of the appearance of her breasts, especially after pregnancy. Your complaints are likely due to post-pregnancy changes of your breasts as they likely enlarged and stretched during and immediately after your pregnancy as they became engorged with milk for lactation. Now, they have a typical "deflated" appearance as they have settled but have lost much of the enlargement during your pregnancy. Options to ameliorate your complaints would include implant placement, breast lift, fat grafting, or a combination of these modalities. A consultation with a plastic surgeon may help you decide which procedure(s) may be the best option for you. It may be wise to wait until after you have completed child bearing, as similar changes will occur after each pregnancy. Also, it is not uncommon to have different sizes of breasts, but I would recommend evaluation if there is a sudden change in one side from another, a mass is felt to account for the size difference, any changes in skin or nipple appearance, or drainage/bleeding from the nipple. Changes can certainly continue after future pregnancies. Hope that these answers help!