hiya hun, i havent had mine done just yet, but am next month with mr chantarasak, im borderline having uplift or just impltans, i think it really depends on if and how saggy your boobs are or nipple placement (under crease line etc) my nipples dont point down and are above crease line so iv opted for bigger implant (which surgeon had suggested) they say to measure from your collar bone to your nipple anything above 25cm they would recommend one mine is 23.5 but they still made it an option for me.
personal prefrence though really, i looked online at pictures of women who have sagged and either have gone for uplift or not, just to get an idea of what mine could look like.
but generealy speaking yes a ba will give some lift to your breast.hope this helped and best of luck hun xx