Body odor increases during pregnancy because your sweat glands become progressively more active across all three trimesters, and hormonal shifts change the composition of what your body releases through your skin. The good news: this is completely normal, and there are straightforward ways to manage it.
Adding to the challenge, about two-thirds of pregnant women report their sense of smell as abnormally sensitive. So you may be noticing odors on yourself that others can’t detect at all. A 2007 study found that 85% of pregnant women identified at least one odor they’d become more sensitive to, and body odor was specifically listed among the “social odors” that pregnant women found newly unpleasant.
Why Pregnancy Makes You Sweat More
Your body recruits more and more active sweat pores as pregnancy progresses. Research using skin capacitance mapping found a significant increase in eccrine sweat gland activity between each trimester. These are the glands spread across most of your body, and they respond to heat, emotion, and even certain foods. During pregnancy, changes in your adrenal gland activity and autonomic nervous system ramp up vasomotor activity, leading to excess sweating everywhere except the palms.
The odor itself comes from a different set of glands: your apocrine glands, which sit in areas with hair follicles like your underarms and groin. These glands release a thicker secretion that’s initially odorless, but when it meets bacteria on your skin’s surface, that’s what produces the smell. With more overall moisture on your skin during pregnancy, bacteria have a richer environment to work with, and the result is stronger body odor.
Foods That Make It Worse
What you eat directly affects how you smell, because certain compounds are absorbed into your bloodstream and released through your sweat. The biggest culprits are foods high in sulfur. Garlic and onions can boost metabolism and body heat, increasing sweat production and giving bacteria more to work with. Cruciferous vegetables like broccoli, cabbage, Brussels sprouts, and cauliflower also release sulfuric compounds that intensify when mixed with sweat.
Spices like curry, cumin, and fenugreek contain volatile compounds that travel through your blood and exit through your pores, sometimes lingering on skin, hair, and clothing for hours. Red meat releases odorless proteins through perspiration that become pungent when they encounter skin bacteria. Alcohol is metabolized into acetic acid, which your body pushes out through your pores. You’re likely already avoiding alcohol during pregnancy, but it’s worth knowing the mechanism.
You don’t need to eliminate all of these foods. But if you’ve noticed your body odor spiking, cutting back on the strongest offenders, particularly garlic, onions, and heavy spice blends, can make a noticeable difference within a day or two.
Choosing the Right Fabrics
Your clothing choice matters more than you might think, because trapped moisture feeds the bacteria that cause odor. Not all breathable fabrics are equal when it comes to managing sweat.
- Linen is the strongest option. Its loose weave makes it highly breathable, it absorbs moisture well, and it dries quickly, which means bacteria have less time to build up.
- Merino wool (in thin, lightweight styles) breathes well and wicks moisture effectively. It’s not the heavy wool of winter sweaters.
- Cotton is soft and absorbent but holds onto moisture once it’s wet. In humid conditions or during heavy sweating, it can stay damp against your skin for a long time.
- Technical polyester found in athletic wear is designed to wick sweat and dry fast. The polyester in regular dress clothing does not perform the same way.
- Rayon and silk are both lightweight but poor at getting rid of moisture. Silk in particular is a bad choice if you’re sweating heavily.
- Nylon dries quickly but isn’t very breathable, which can actually trap odors.
Changing your shirt or undergarments midday, if you have the option, is one of the simplest and most effective strategies. Fresh fabric resets the bacteria-and-moisture cycle.
Skin Cleansing and pH Balance
Your skin’s natural acidity acts as a defense against odor-causing bacteria. Harsh, alkaline soaps disrupt this protective layer, and research has shown that even minor differences in the pH of cleansing products can shift the bacterial populations on your skin. During pregnancy, when your skin is already managing more moisture, this balance matters even more.
For your body overall, a mild, pH-balanced cleanser will clean effectively without stripping your skin’s natural defenses. For intimate areas, external washes formulated with lactic acid and an acidic pH are considered the safest option for supporting the natural microflora. Internal washing or douching is not recommended, as it can actually increase the risk of infections. If you shower twice a day during pregnancy, a gentle cleanser rather than regular soap will help you avoid the dryness and irritation that can come with frequent washing.
Antiperspirants and Deodorants
Standard antiperspirants and deodorants are generally considered safe during pregnancy. Antiperspirants work by temporarily blocking sweat pores with aluminum-based compounds, while deodorants mask or neutralize odor without reducing sweat volume. Some research has raised questions about aluminum absorption, particularly during breastfeeding, where one study examined whether aluminum-based antiperspirant use affected aluminum levels in breast milk. If this concerns you, aluminum-free deodorants are widely available and work by targeting bacteria or neutralizing odor with ingredients like baking soda or zinc.
Applying antiperspirant at night before bed, rather than in the morning, gives the active ingredients time to settle into your pores when sweat production is lower, making them more effective the following day.
Staying Hydrated
Drinking more water won’t eliminate body odor, but adequate hydration helps dilute the concentration of waste products your body excretes through sweat. When you’re dehydrated, your sweat contains a higher ratio of the compounds bacteria feed on, and the result is a more concentrated smell. During pregnancy, your fluid needs are already higher, so staying well-hydrated serves double duty.
When Odor Signals Something Else
Most pregnancy-related body odor is harmless, but a strong fishy vaginal odor can indicate bacterial vaginosis, which affects pregnant women at higher rates. The signs include thin white or grey discharge, a fishy smell that’s especially noticeable after sex, and itching or burning in or around the vagina. Many women with bacterial vaginosis have no symptoms at all, which is why it’s worth mentioning any new or unusual vaginal odor to your care provider. Bacterial vaginosis during pregnancy is treatable and worth addressing, since untreated cases can carry risks.
How Long It Lasts After Delivery
The sweating and odor changes don’t stop the moment you give birth. Postpartum night sweats are common and tend to be worst during the first two weeks after delivery, sometimes heavy enough to soak through clothing and sheets. This happens as your body rapidly readjusts its hormone levels. The sweating, and the body odor that comes with it, typically resolves on its own within a few weeks. If postpartum sweating persists beyond three weeks, it’s worth checking in with your provider to rule out other causes.