Will large implants (1000 CC) affect breastfeeding in the future?

As a board-certified plastic surgeon in Sarasota Florida specializing in breast augmentation, I frequently see patients considering larger implant sizes (such as 1000 cc) and wondering how this may impact their future breast-feeding ability.
The short answer is: It depends more on surgical technique and individual anatomy then implant sizes alone. Implants–whether 300 cc or 1000 cc–typically do not interfere with breast-feeding if the milk ducts and nerves around the nipple are preserved. This is most commonly achieved through an inframammary (under the breast) incision which minimizes disruption of the glandular tissue.
That said, larger implants can stretch the breast tissue more significantly, which may reduce glandular function or change nipple sensitivity in some patients–both of which are relevant to milk production. If you are planning to breast-feed in the future and considering very large implants, it is important to discuss this with your surgeon preoperatively, so the technique can be adjusted to protect your lactation potential.
You can learn more about how I approach breast augmentation in women planning future pregnancy and breast-feeding here:
Dr. Brandon LambirisBoard-Certified Plastic Surgeon–Sarasota, FL Specializing in Natural, Breastfeeding-Friendly Augmentation

While it is possible to breastfeed with implants, impact on breastfeeding ability is a risk with breast augmentation, and this risk increases with larger implants.

It's perfectly ok for you to breastfeed with implants. As the incisions are under the fold of the breast or through your armpit, you should not have any problems breastfeeding. It is no different than any women who didn’t have İmplants.