Updated: 2019, Aug 7

Linea Nigra during Pregnancy: Why Does it Appear

Linea Nigra during Pregnancy: Why Does it Appear

Every woman has a pale, vertical line that begins at the belly button running down to the abdomen. This line is called linea alba. During pregnancy, the linea alba becomes more prominent and changes in color. This is thereby termed as Linea Nigra.

The term “Linea Nigra”, literally means “Black line”. However, despite its name, the line is not at all black in color. It appears brownish and darker than the normal skin tone of the pregnant woman. Because of this it becomes visible or prominent. It usually measures approximately 0.25 to 0.50 inches wide stretching from below the rib cage or from the belly button to the pubis.

Old folks state that if the line begins at the belly button, the woman will bear a baby girl. On the other hand, if it begins at the bottom of the rib cage, the pregnant woman is expecting a baby boy. Another belief says that only women bearing baby boys have this line. However, these are merely myths old folks used to believe in.

What Causes Linea Nigra?

During pregnancy, hormonal changes, particularly increase in estrogen, causes hyperpigmentation. Thus, there is an increase in the production of melanin, the pigment responsible for a darker skin. The reason behind the location of the linea nigra has no concrete explanation yet. However, the same reason causes the darkening of the areolas and clitoris during pregnancy.

When Does Linea Nigra Start to Appear?

The Linea Nigra can begin to appear as early as the end of the first trimester, or during the second trimester. Those pregnant women who are expecting twins or triplets may begin to notice the discoloration early in the first trimester. This is because of the presence of more hormones compared to single pregnancies. Furthermore, it is also normal to notice that as the pregnancy progresses the line becomes darker.

What Risk Factors Contribute to a More Pronounced Linea Nigra?

Majority of the women develop linea nigra. However, the extent of discoloration varies. Women who belong to either of the following conditions are more likely to develop darker linea nigras than those who do not qualify:

  • Dark-skinned Ethnic Groups. Women belonging to African or Asian races are more prone to pronounced linea nigra. This is because they have a higher amount of melanin in the skin. Thereby making them more prone to hyperpigmentation.
  • Sun Exposure: Women frequently exposed to the sun, especially during pregnancy, are also prone to darker linea nigra. This is because the sunlight stimulates melanin production, which may eventually lead to hyperpigmentation.

Will Linea Nigra Have any Harmful Effect Towards the Pregnancy?

Linea nigra is not at all harmful to the pregnant woman and her baby. Actually, it is a sign that the pregnancy hormones are working as efficiently as they should.

Will the Discoloration Disappear?

Like chloasma, the discoloration caused by linea nigra will eventually fade away. However, it may take a long time for it to vanish completely, especially when the mother chooses to breastfeed. Furthermore, sun exposure, can cause it to darken again, thereby reversing the progress made.

Can Linea Nigra be prevented?

The development of linea nigra during pregnancy is considered to be a natural phenomenon. Therefore, there is no way to prevent such from occurring. However, there are measures that can be taken to minimize the discoloration if it seems bothersome to the pregnant woman.

Must Watch – What is Linea Nigra?

How Can the Discoloration be minimized?

There are a few ways to keep the discoloration to a minimum. These measures include the following:

  • Covering up: Making use of cosmetic make-ups, like base, can cover the discoloration for a couple of hours. However, this make-up can in due course be wiped off and could damage or stain one’s clothing.
  • Folic Acid: This mineral is known to control the skin’s pigment change. Thus, including food rich in folic acid will help keep the discoloration to a minimum. Foods, such as asparagus, whole wheat, spinach, beans, and orange juices, are some foods rich in folic acid. Moreover, these foods in particular, are said to reduce the discoloration caused by linea nigra.
  • Avoid Sun Exposure: The sun may stimulate the production of melanin. Therefore, avoiding sun exposure will help minimize the darkening of the linea nigra.
  • Wear Sunscreen: Wearing sunscreen can also help but exposing the abdomen to the sun will still do some damage, even with the sunscreen applied.
  • Fresh Lemon Juice Application: Applying fresh lemon juice onto the affected area may help reduce or lighten the discoloration. However, it is important to consult the physician before doing so.

When Should the Pregnant Woman Call Her Healthcare Provider?

It is important for a pregnant woman to consult her healthcare provider whenever she has concerns about her pregnancy. However, linea nigra is not at all harmful, and treatment is unnecessary. The best regimen is a healthy diet and time. The line will begin to fade away as soon as the baby is born.


Peony C Echavez

Peony is a registered nurse and former Director of Nursing services for a large nursing facility. She has written web content for a lar

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