Tanning while pregnant is not considered safe, whether you’re lying in the sun, using a tanning bed, or stepping into a spray tan booth. Pregnancy hormones make your skin more reactive to UV light, your body less efficient at cooling itself, and UV exposure can deplete folate, a nutrient critical for your baby’s development. There are safer alternatives if you want a bronzed look, but they come with their own considerations.
Why Pregnant Skin Reacts Differently to UV
Pregnancy changes your skin in ways that make UV exposure riskier than it would be otherwise. Elevated estrogen and progesterone increase melanin production and distribution, particularly on the face. This is why up to 70% of pregnant women develop melasma, sometimes called “the mask of pregnancy,” which appears as dark, blotchy patches on the cheeks, forehead, nose, and upper lip.
UV and infrared radiation from the sun are the primary triggers that make melasma worse. Because your melanocytes (the cells that produce skin pigment) are already in overdrive from hormonal stimulation, adding UV exposure on top of that is like pouring fuel on a fire. The patches tend to worsen during summer months and can persist long after delivery. Tanning beds, which deliver concentrated UV radiation, carry the same risk.
UV Light Can Lower Your Folate Levels
This is the risk most people don’t know about. UV radiation breaks down folate circulating in your blood, and folate is essential during pregnancy for preventing neural tube defects like spina bifida. Pregnant women need around 600 micrograms of folate per day, higher than the general population, specifically because the developing nervous system depends on it.
A study of women of childbearing age found that after two weeks of folic acid supplementation, those with higher personal UV exposures had significantly greater depletion of serum folate compared to women with lower exposures. UV exposure was the single strongest predictor of folate decline, accounting for 20% of the overall change. A separate study found that a single day of sunbathing reduced plasma folate from 38 to 28 nanomoles per liter, a meaningful drop. For someone who is pregnant and relying on adequate folate levels for fetal brain and spinal cord development, this kind of depletion matters.
Overheating Is a Bigger Concern Than You Think
Your body works harder to regulate temperature during pregnancy because it’s cooling two people, not one. This makes you more susceptible to heat exhaustion and heat stroke than you would normally be. Lying in direct sun or inside a tanning bed, where temperatures can climb quickly, compounds this risk.
Dehydration sets in faster during pregnancy because your blood volume is expanded and your fluid needs are higher. Overheating in early pregnancy has also been associated with developmental concerns for the baby, which is why hot tubs and saunas carry similar warnings. A tanning session might feel relaxing, but your body is under more thermal stress than you realize.
Tanning Beds Aren’t a Safer Option
Tanning beds deliver the same UV radiation as the sun, often at higher intensity over a shorter period. They carry all the same risks for melasma, folate depletion, and overheating, plus the well-established link to skin cancer that applies to everyone. There is no version of UV tanning that avoids these pregnancy-specific concerns. The enclosed environment of a tanning bed can also accelerate overheating since heat has nowhere to dissipate.
What About Spray Tans and Self-Tanners?
Self-tanning products use a sugar-based compound called DHA that reacts with dead skin cells on the surface to produce a temporary brown color. The FDA has approved DHA for external skin application, and toxicity studies have found no embryotoxic properties even at very high doses. Only about 1.7% of DHA applied to the skin is absorbed into the body over 24 hours, with the vast majority staying in the outermost skin layers.
Lotions and creams that you rub on yourself are the lowest-risk option for getting a tan look during pregnancy. The key distinction is between rub-on products and spray booths. The FDA has not approved DHA for inhalation, and commercial spray tan booths make it difficult to avoid breathing in the mist or getting it on mucous membranes like your eyes, lips, and nasal passages. There is simply no safety data on what inhaled DHA does during pregnancy.
If you want a sunless glow, a self-tanning lotion or cream applied by hand eliminates the inhalation concern entirely. Avoid spray booths during pregnancy, or at minimum ensure you have nose plugs, lip protection, and eye coverage if you do use one.
How to Get Vitamin D Safely
You don’t need to tan to get adequate vitamin D. In spring and summer, exposing your hands, face, neck, and arms to midday sun for about 8 to 10 minutes produces enough vitamin D for the day. In southern climates like Miami, as little as 3 minutes is sufficient. Winter requires longer exposure, up to 23 minutes in northern cities like Boston, and people with darker skin need even more time.
These brief exposures are a far cry from a tanning session. You can meet your vitamin D needs without the prolonged UV exposure that damages skin, depletes folate, and triggers melasma. A prenatal vitamin with vitamin D covers any remaining gap.
Protecting Your Skin During Pregnancy
When you are outside, mineral sunscreens containing zinc oxide or titanium dioxide are generally preferred during pregnancy. The American College of Obstetricians and Gynecologists specifically recommends avoiding oxybenzone, a chemical sunscreen ingredient found in many popular brands. Mineral sunscreens sit on top of the skin and physically block UV rays rather than being absorbed into the body.
Wearing a wide-brimmed hat, staying in the shade during peak hours (10 a.m. to 4 p.m.), and keeping outdoor time brief all reduce your exposure without requiring you to stay indoors for nine months. The goal isn’t to avoid the sun entirely. It’s to avoid the kind of prolonged, deliberate UV exposure that comes with tanning.