@hotrod351 - I've done a lot of reading about abilify and weight gain, because it really did change my body (personally), and there seem to be a number of people who that's happened to. What we all seem to have in common is a definite propensity to weight gain - 'fat genes', you could say. So, if you look at where you inherited your genes, and you've got a family pool that is built heavy, and weight management is a real struggle for you - then I would honestly recommend that you just watch it very, very carefully - or, ask to try a different adjunct. I don't know from what you posted if abilify is being added on to the sertaline, or being swapped.
Abilify helps many people. It helped me, for sure. But I was incredibly specific about not changing a thing regarding how I was eating, and I maintained the exact same activity level, and I gained weight anyway. That sort of thing can happen with this drug.
Other people report a real increase in carbohydrate cravings, and a compromised ability to 'work off' the initial burst of weight gain that comes from that. There is no hard data explaining why the mechanism of the drug triggers this, but it is very, very common.
For some, it's weight neutral. Abilify is (I believe) the most consistently weight-neutral drug in the atypical antipsychotic class. The other options are zyprexa, seroquel, geodon, and latuda. Latuda is next, in terms of being weight-neutral, and was recently approved as a primary treatment for major depressive disorder. Seroquel, geodon, and zyprexa, when used the way you'll be using abilify, all have more consistent weight-gain profiles.
So, summing up - if you have a history of weight issues, or weight issues run in your family, be extra careful. Otherwise, if you don't let the cravings get the better of you, and you make sure your activity level stays constant, you have decent odds.