Thank you for your question regarding whether you need a tummy tuck after having four kids and whether you have rectus diastasis. By definition, rectus diastasis is the separation of the rectus abdominis muscles by 2.7 centimeters or more. From your pictures, you do not have rectus diastasis. Instead, you have muscle laxity, which means the muscle stretches. This is due to your pregnancies. It is also from the increased size of your perennial cavity. You have some excess skin and fat, but your primary problem is muscle weakness; therefore, I highly suggest a tummy tuck. Liposuction will not fix this problem. During your tummy tuck or abdominoplasty procedure, an incision is made low in the pubic region. Tissue is dissected to the umbilicus and the sternum. The rectus is then plicated, imbricated, strengthened, and flattened by suturing the muscle from the sternum to the pubic region. The second layer of sutures is placed on top of this. Then excess skin and fat are removed, and the belly button is reconstructed. Therefore, I would highly suggest you undergo a tummy tuck. I hope this helps answer your question regarding whether you need a tummy tuck after four pregnancies. If you have any more questions regarding reconstructive surgery after massive weight loss, please contact my office. Reconstructive surgeries after massive weight loss include an abdominoplasty, tummy tuck, thigh lift, breast lift, mastopexy, arm lift, brachioplasty, torsoplasty, back lift, buttock augmentation, and buttock lift. Since these reconstructive surgeries after massive weight loss, are big procedures, please seek an experienced, board certified plastic surgeon with significant experience performing these types of lifts. Do your research. Make sure they have performed at least 100 of each procedure you are considering for reconstructive surgery after massive weight loss. Make sure they have the before and after pictures to prove it. Carefully examine their before and after pictures and check their reviews on RealSelf.