Final answer:
Diastasis recti is a bulge and weakness of the linea alba, without herniation. It occurs when the linea alba stretches and separates.
Step-by-step explanation:
A diastasis recti is a bulge and weakness of the linea alba, with no actual herniation. The linea alba is a white, fibrous band that connects the bilateral rectus sheaths at the midline of the body. It encloses the rectus abdominis muscles, also known as the 'sit-up' muscles. Diastasis recti occurs when the linea alba stretches and separates due to factors like pregnancy or excessive abdominal pressure.