Linea Alba

What is the linea alba?

The linea alba is a thin band of connective tissue that runs down the front of your abdomen. It separates the left and right sides of your rectus abdominis. Your rectus abdominis is sometimes called your “six-pack abs.” It begins at the lower end of your sternum (breastbone) and ends at the pubic bone. It’s highly elastic (like a rubber band) and strong. It’s an attachment point for other abdominal muscles and helps anchor and stabilize your torso. People can have poor posture, pelvic and back pain and other problems if the linea alba is weak.

Linea alba means “white line” in Latin. The linea alba appears as a colorless groove in people with muscular abdominals (giving the appearance of a six-pack). During pregnancy, the linea alba darkens and is called the linea nigra.

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Conditions like pregnancy and obesity can cause weakness in the linea alba. For example, as your uterus expands and the abdominal wall is stretched outward, your linea alba separates. As a result, the linea alba loses elasticity and weakens. A condition called diastasis reciti occurs when the abdominal muscles remain separated and cause a bulge in the abdomen.

What is the linea nigra?

The linea nigra is a dark vertical line that appears on the skin of your stomach during pregnancy. It’s also called the pregnancy line. It runs from your belly button to your pubic area. In some people, the line extends to the breastbone.

What is diastasis recti?

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Diastasis recti is when the rectus abdominis muscles separate during and after pregnancy from being stretched. The separation can make your belly stick out or bulge months or years after you’ve given birth.

Does everyone have a linea alba?

Yes, everyone has a linea alba. However, most people won’t notice their linea alba because it blends into their skin (unless you’re pregnant).

Why does your linea alba appear in pregnancy?

The linea alba gets darker in pregnancy because of higher hormone levels. The placenta causes your body to create more melanin. Melanin gives your skin its color. The increased melanin levels cause the linea alba to darken and appear on the skin’s surface.

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