Diastasis recti, some spell it as "Diastsis recti" (also known as abominal separation) is a disorder defined as a separation of the rectus abdominis muscle into right and left halves. Normally, the two sides of the muscle are joined at the linea alba at the body midline. Diastasis of this muscle occurs principally in two populations: newborns and pregnant women. In the newborn, the rectus abdominis is not fully developed and may not be sealed together at midline. Diastasis recti is more common in premature and African American newborns. In pregnant or postpartum women, the defect is caused by the stretching of the rectus abdominis by the growing uterus. It is more common in multiparous women due to repeated episodes of stretching. When the defect occurs during pregnancy, the uterus can sometimes be seen bulging through the abdominal wall beneath the skin.