Choosing between over-the-muscle (subglandular/subfascial) and under-the-muscle (submuscular or dual plane) breast augmentation really depends on your anatomy, lifestyle, and the type of result you’re hoping to achieve. At 5’1” and 108 pounds, you have a smaller frame and less breast tissue, so implant selection and surgical planning become especially important in creating a balanced, natural-looking outcome. When deciding on implant placement, I typically encourage patients to think beyond just “what is technically best” and instead focus on what fits their body and lifestyle. For example, if you are very active or regularly use your chest muscles for activities such as weightlifting, CrossFit, yoga, tennis, or certain jobs that involve repetitive upper body movement, over-the-muscle placement can sometimes be a better option because it avoids animation deformity, where the implants move or distort slightly when the chest muscles contract. I also spend a lot of time discussing aesthetic goals with patients because there is not one single “correct” type of augmentation. I often ask patients to bring wish pictures so I can better understand whether they are looking for a softer, more natural enhancement or a fuller, more augmented appearance. Based on your height, weight, and the photos you posted, you may be a very nice candidate for the Motiva Preserve technique using Motiva Ergonomix implants if your goal is a more natural shape and feel. Ergonomix implants are designed to adapt more naturally to movement and body position, which many patients appreciate when they want a subtle, elegant enhancement rather than a very round or obviously augmented look. On the other hand, if you prefer a fuller upper-pole appearance or a more dramatic enhancement, Motiva Round implants combined with additional internal support, such as an internal bra technique, may be a better fit for your goals. One of the most important things to understand is that breast augmentation is highly individualized. There are certainly “textbook” answers in plastic surgery, but you aren't a book, you're a person. The best surgical plan is the one that matches your anatomy, lifestyle, tissue characteristics, and personal aesthetic preferences. I always recommend reviewing extensive before-and-after photos of different implant types, profiles, and placement techniques to help determine which results resonate most with you. What looks perfect on one patient may not feel right for another, and that is completely normal. A thorough consultation with a board-certified plastic surgeon who can evaluate your tissue quality, chest dimensions, skin elasticity, and goals in person will ultimately help determine which approach will give you the safest and most satisfying long-term result.