There are a number physiologic changes that come with pregnancy which can ultimately affect your aesthetic outcome post operatively. The two most common are related to weight gain and skin stretch/skin excess.It is important to remember that post puberty the population of adipocyte (fat cells) a patient has will remain stable for the rest of their lives. Weight gain and loss does not signify a quantitative change in the population but rather a qualitative one. The cells will shrink or swell as your weight does the same. Liposuction reduces the population of cells in a treated area from a quantitative stand point but does not prevent qualitative changes. Thus a large weight gain (as seen in pregnancy) may manifest itself by growth in areas previously treated. Liposuction now does not ensure that there will be no changes in the future. That being said, treated areas do exhibit a reduced potential for change due to the diminished population of fat cells.As always, discuss your concerns with a board certified plastic surgeon.