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If your child is born with lanugo, it will most likely fall out and go away on its own within a few weeks. However, it's normal for it to last longer, especially if your baby is a preemie. Babies will naturally lose the hairs over the space of a few days or weeks following birth. Lanugo itself is not a medical condition but a natural biological response to certain health conditions and stages of life. As a result, it is not something that requires direct treatment. One 2006 review refers to a study that found one case of lanugo-like hair growth in a person who had celiac disease.
Lanugo Hair – What is it?
If a tumor causes lanugo, your healthcare provider will typically remove the tumor. Even if the tumor isn’t cancerous, it can rupture or lead to other problems. If your tumor is cancerous, your healthcare provider may recommend chemotherapy, radiation therapy or a combination of the two in addition to surgical removal. Once the tumor is treated, the lanugo hair should stop growing. Useful as lanugo may be in utero, it may not be a thing you want to highlight in your newborn baby’s photo session. Your newborn will likely be lanugo-free within a few weeks after birth.
What Causes Hypertrichosis?
This is not lanugo and may be caused by a condition called spina bifida. Lanugo can occasionally regrow in older children or adults. However, this is a bigger mystery and might signify a more serious health issue. Premature babies tend to have more lanugo when they’re born. Although some full-term babies still have some left by the time they’re born, most shed this hair inside the womb before the eighth month.
Skin Protection
The sight of a baby covered in hair can be distressing, but it is perfectly normal. Not all babies are born with lanugo, but all of them were coated with it in the womb. The hair usually goes away before birth, but sometimes it sticks around until a baby is born or even for a few months after.
Should you remove lanugo hair?
If there is also a family history of similar symptoms, this can also help suggest the diagnosis. Some babies are born with a full head of hair, only to go bald within the first few months of life. Lanugo plays a vital role in binding the vernix to the skin; this protects the fetus from damaging substances found in amniotic fluid.
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Lanugo
Blood tests can be useful to identify abnormal testosterone levels or other hormonal imbalances. If a doctor suspects an underlying health condition like thyroid disease or cancer, imaging tests like ultrasounds may be necessary. Pelvic and transvaginal ultrasounds can be helpful if looking for signs of PCOS, which is a common cause of hirsutism.
Fetal development
Another theory is that the movement of lanugo on your baby’s skin might play a role in the release of hormones that reduce stress and stimulate their growth inside the womb. As your baby gets closer to their due date (40 weeks), they will have less lanugo, less vernix, and less protection against the effects of floating in amniotic fluid. You can often see these effects when a baby is overdue, as they tend to have wrinkly, peeling skin. When it does, it is almost always due to advanced-stage eating disorders, particularly anorexia. Lanugo appears to play an essential role in the healthy development of a fetus. However, the appearance of lanugo on adults experiencing various diseases is a bit more mysterious.
Don’t stress about baby tresses
In 2011, a team of researchers implicated a specific gene that controls hair growth during fetal development. Since some cases have occurred within families, it seems likely that genes are involved. Research on hypertrichosis is somewhat limited because so few cases have been diagnosed. While the cause may be elusive, cosmetic technology, especially hair removal, can treat even severe forms of the condition. The lanugo hair consists of short, thin, non-marrowed, low-pigment or pigment-free hair. They are shed in the 7th-8th month of intrauterine development.
More on Healthy Aging
In severe cases, the spine will be visible outside the skin, and the child will need surgery to correct it. However, in milder cases, there is no opening, and the defect is hidden (3). This is why, if you or a loved one has lanugo, it’s important to talk to a doctor as soon as possible.
Lanugo is typically shed before birth, typically at about 33 to 36 weeks of gestation. However, it may persist even after birth; therefore, the newborn may be seen covered with lanugo. Most often, this soft, downy hair appears on preemies, but full-term newborns are sometimes born with lanugo, too. While it can be a surprise for parents to see, it's not a cause for concern. Learn more about why this baby hair is there, how long before it typically goes away, and when, in rare instances, it could be a sign of a problem.
There are fewer than 50 documented cases of congenital hypertrichosis. It’s most common in men who live in India and Sri Lanka. It’s rare, but babies born to women with diabetes can have hairy ears. Studies show that the better you control your disease while you’re pregnant, the less likely your baby is to have it. Lanugo also helps to increase your baby’s growth rate around mid-gestation.
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