The  impact of a pregnancy on breast or any kind of other plastic surgery is hard to predict, but most women remain satisfied with their breast reduction results after childbirth. You can expect your breasts to increase in volume during pregnancy, but they will go back down in size after you’ve given birth. Most women lose volume after childbirth and breastfeeding. This is something to consider when planning the size of your breasts after reduction – if you go too low, you might become smaller than expected after childbirth.