Diastasis recti (dahy-as-tuh-sis rek-tahy) is the displacement of the abdominal wall muscles. Diastasis recti is the partial or complete displacement of the rectus abdominis, or “six-pack” muscles, which meet at the midline of your stomach. Diastasis recti is very common during and following pregnancy. This is because the uterus stretches the muscles in the abdomen to accommodate your growing baby.