Thank you for the question.
Breast lifting and breast reduction surgery are similar in that both operations will raise the position of the breasts on the chest wall; In other words, both operations do lift the breasts. If your goal is to decrease the size of the breasts as well, then breast reduction surgery is indicated. During breast reduction surgery breast skin, adipose tissue, and breast tissue is removed thereby reducing the overall size of the breasts.
Yes, pregnancy can bring about changes to the breasts that may require further surgical intervention; if you are able to wait until after pregnancies and when you have reached a long-term stable rate you will minimize the chances you will need additional surgery.
Timing of the operation will depend on the patient's life circumstances. In general, it is best to do these procedures ( like all other elective body contouring the stages, when patients have reached their long-term stable weights. In doing so, improve the safety of the procedure and minimizes the need for further surgery ( in the event of weight gain/loss after the breast procedure).
I hope this helps.