Breast Fat Transfer causes sagginess after pregnancy?

Breasts do tend to change with pregnancy  and breastfeeding, so you may want to wait until after both are completed.  Any added weight to the breast will have a greater tendency over time to increase drooping.  However, the placement of the fat has a great deal to do with the apparent weight that the skin envelope experiences.Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA

Fat will not prevent sagging. I would suggest avoid any transfers until about 6 months after stopping breast feeding to let your breasts return to what shape and size they will be. You might find that you don't' need fat or need implants instead.

Thank you for your question.  With pregnancy and breast feeding, your breasts will change.  It does not matter if your breasts are 100% real, have implants, or have fat grafting. No one can predict how it will effect the breasts until after you have recovered from pregnancy and breast feeding.