Is Breast Lift Recommended for 40G Size Breasts?

Based on the information you provided, it sounds like you are an ideal candidate for a breast lift and reduction surgery. Unfortunately, there are some risks and complications involved with any surgery, but it may be beneficial for you as well. I would recommend consulting with a board certified plastic surgeon to determine and discuss the best and safest possible option for your needs, as well as the risks involved in the surgery. Depending on the severity and complexity of the case, recovery time could vary. There are pros and cons of having surgery. You just have to decide whether you want to have it done or not. It is primarily your decision. For more information regarding the procedure you are interested in, check out my website and compare before and after photos of patients.

The scar pattern of a breast lift and a breast reduction are the same. The difference is how the underlying breast tissue is manipulated. In breast reduction the breast tissue is removed while maintaining an aesthetic shape to the breast. Removing both skin and breast tissue allows for appropriate tension to be placed on the skin and minimizing poor scarring. Trying to tighten skin around a 40 G size breast doesn't make much sense to me. The skin has stretched because it can not accomodate the weight of your breasts. I would also think with 40 G breasts you have some issues with shoulder grooving, neck pain and possibly rashes under the breasts. These issues would not be corrected with a lift.
Also the size of the breast doesn't dictate how effective you will be at breast feeding. Often very large breasts make it more difficult for the infant to nurse.
Any surgical procedure on the breast has the potential to diminsh your ability to breast feed. That being said, I have breast augmentation and reduction patients who have been able to breast feed after surgery.

Your breast are too large to have a realistic lift. The breast lift mainly recontours the breast by the use of the skin. So if you have such large breasts a breast lift is not the way to go. A breast reduction is what you need to reduce the size of the breasts and provide a lift which will be longer lasting than just getting a lift now with the 40G breasts.

Breast reduction does not necessarily interfere with breast feeding but you are correct that it may affect your ability to breast feed later.