Cosmetic body contouring results are never permanent. Your ultimate aesthetic outcome is subject to the unavoidable march of time as well as any changes you may undergo in weight or shape. Weight can fluctuate, skin quality will change etc. Pregnancy generally includes a series of physiologic changes which (to a certain extent) permanently change a woman's body in dramatic ways. The "Mommy Makeover," which has become so popular, is founded on the inevitability of these changes. The volumetric expansion of the abdomen does not "stretch" the skin so much as it "expands" it creating new additional skin in the process (although the extent to which this occurs is variable). Additionally, the laxity of the abdominal musculature (which is necessary for support of the developing baby) is something which may not simply resolve post-partum necessitating operative plication or tightening. With that in mind, timing of surgery as it relates to pregnancy is something which should be approached with caution. Patients need to understand that post pregnancy changes can compromise their ultimate aesthetic outcome. This does not mean that pregnancy need be avoided...but patients must be prepared for either the changes or the requisite revisionary surgery before proceeding.In summary, liposuction will not influence your ability to have children. There is the potential for the development of sagging (or more appropriately excess) skin and muscle laxity, which can only be addressed surgically. As always, consult with a board certified plastic surgeon.