Can Exposure to Mold During Pregnancy Cause Miscarriage?

When it comes to our home environment, mold is often seen as a mere nuisance that causes unsightly patches on walls or a musty odor in the basement. The potential health implications of mold exposure can be far more serious and can affect the most sensitive among us, including pregnant women and young children. In this post, we delve into an important question that is often asked but rarely discussed in detail: Can mold cause miscarriage? 

Mold is a type of fungus that thrives in damp and humid environments. It reproduces by producing tiny spores that can float in the air and land on surfaces. The spores can then grow into new mold colonies if conditions are favorable. When mold spores are inhaled or come into contact with mucous membranes, such as those in our nose and throat, they can trigger allergic reactions and respiratory problems. This is especially true in people with preexisting conditions like asthma or allergies. Elderly people and those with certain medical conditions are also at a higher risk of developing health issues due to mold exposure. Read on to learn more about how exposure to mold can potentially impact pregnant women.

This article is for informational purposes only and does not give medical advice. Always check with your health care provider with any questions or concerns you have during your pregnancy.

Are All Types of Mold Dangerous to Pregnant Women?

There is more than one type of mold, and some types are more harmful than others. For instance, black mold or Stachybotrys chartarum is known to produce mycotoxins that can cause a range of health problems when inhaled or ingested. However, not all strains of this species produce these toxins. Black mold spores are also bigger than other types of mold spores, which means they usually do not become airborne.

Similarly, other types of mold like Penicillium, Aspergillus, and Cladosporium are commonly found in homes but do not necessarily pose serious health problems to pregnant women. In fact, some of these molds have been used to produce life-saving antibiotics like penicillin. 

Even cheese mold can cause health problems to pregnant women. It is important for expecting mothers to be cautious of the type of cheese they consume. Some types of soft ripened dairy products, like blue cheese and soft cheeses made with unpasteurized milk, may contain harmful strains of mold, such as the listeria bacteria. Listeria can cause miscarriage or other complications during pregnancy. Therefore, it is always best to consult with a healthcare professional before consuming any food that may contain mold.

That being said, any type of mold growing indoors is considered a potential health hazard, especially for pregnant women who may be more susceptible to any detrimental effects. The key is to identify and address the source of moisture that is allowing mold to thrive in your home. Then you can take steps to safely remove the mold and prevent it from coming back.

A woman wearing a mask and rubber gloves is cleaning a window with a yellow sponge.

How Can Exposure to Mold Affect Pregnancy?

Pregnant women are more vulnerable to potential health risks from mold exposure due to changes in their immune system and hormonal levels. This weakened immune system can make a pregnant person more sensitive to allergens, including mold spores. It can also increase their risk of developing respiratory problems or allergic responses like asthma or allergies. 

Furthermore, if a pregnant woman is already experiencing respiratory issues such as asthma or allergies, exposure to mold can exacerbate these health conditions. It can potentially lead to more severe complications for both the mother and the unborn baby. 

In addition, exposure to large quantities of mold during pregnancy has been linked to a higher risk of pregnancy loss, preterm birth, and low birth weight in a newborn baby. Birth defects and developmental delays have also been associated with toxic mold exposure during pregnancy. 

Skin rashes and infections are also possible outcomes of mold exposure during pregnancy. This is because mold can irritate the skin, causing redness, itching, eye irritation, and inflammation. Open wounds or cuts on the skin can also become infected if they come into contact with mold-contaminated surfaces.

The Environmental Protection Agency (EPA) recommends that pregnant people avoid areas with mold growth and have someone else clean up the affected area to minimize their exposure. It is also important for pregnant women to seek medical attention if they suspect or experience any symptoms related to mold exposure.

Symptoms of Black Mold Exposure During Pregnancy

Since black mold is known to produce mycotoxins, it is important to be aware of the potential symptoms of exposure. Pregnant women who have been exposed to black mold may experience respiratory problems such as:

  • Coughing
  • Wheezing
  • Difficulty breathing
  • Headaches
  • Dizziness
  • Fatigue
  • Skin irritation
  • Muscle Aches

If you are pregnant and experiencing any of these symptoms, it is important to consult with your healthcare provider and inform them about potential mold exposure in your home. They can advise you on the best course of action to protect yourself and your baby.

Does Mold Cause Miscarriage?

We have talked about the potential risks of mold exposure during pregnancy, but can it actually cause miscarriage? Unfortunately, research on this topic is limited and inconclusive. While some scientific studies suggest a link between mold exposure and increased risk of miscarriage, other studies have not found a significant correlation.

During the first trimester of pregnancy, the risk of early miscarriages is naturally higher due to various factors. This can make it difficult to pinpoint a specific cause of the loss. Mold can still have an impact during the second trimester and third trimester. 

However, the fact remains that mold exposure can lead to a range of harmful health effects for pregnant women, which can ultimately affect the health of the developing baby. Therefore, the safest approach is to take steps to prevent and address mold growth in your home, especially if you are pregnant or planning to conceive.

How is Mold Exposure Treated During Pregnancy?

If it is verified that mold exposure is causing health issues or toxic effects during pregnancy, the first step is to remove yourself from the contaminated environment. This may include staying with family or friends until the source of mold can be addressed and remediated.

Your healthcare provider may also recommend certain medications or treatments to alleviate any symptoms you are experiencing. In addition, they may suggest ways to boost your immune system and reduce inflammation caused by mold exposure.

Once the mold toxins are removed from the home, it is important to take preventative measures to prevent future mold growth. Regularly cleaning and maintaining your home can also prevent mold from thriving.

Ultimately, the best way to protect yourself and your baby from potential risks of mold exposure during pregnancy is to be aware and take action at the first sign of contamination. You can still have a healthy pregnancy and protect both yourself and your growing baby.

What Can Pregnant Women Do to Protect Themselves from Mold?

Though it can be scary to think about the risks associated with indoor molds, the good news is there are steps you can take to protect yourself and your unborn child from potential health risks associated with mold exposure. It is important to take proactive measures to prevent mold growth in your home. This includes:

  • Fixing any leaks or moisture issues immediately to prevent mold from growing.
  • Keeping indoor humidity levels below 50% by using dehumidifiers if necessary.
  • Properly ventilating areas prone to moisture, such as bathrooms and kitchens.
  • Regularly cleaning and drying surfaces that may be prone to mold growth, such as shower curtains and damp towels.
  • Using a HEPA-filtered vacuum cleaner to thoroughly clean carpets and upholstery.
  • Avoiding using carpet in living spaces that are at risk for moisture, such as basements or bathrooms. 
  • Air conditioner units should also be regularly cleaned and checked for mold growth.

In addition, pregnant women should try to limit their exposure to mold by avoiding high-risk environments such as old or poorly maintained buildings with visible mold growth. If you suspect that your home may have mold, it is best to consult a professional for proper testing and remediation.

If you rent a home, be sure to contact the property owners or management as soon as you suspect mold growth. They are responsible for addressing and fixing any issues with mold in rental properties.

Black mold is on a white brick wall.

What Else Should Pregnant Women Avoid?

Mold is not the only potential risk for pregnant women when it comes to food and environmental exposures. It is also recommended that pregnant women avoid exposure to other harmful substances such as:

  • Pesticides and herbicides
  • Lead and other heavy metals
  • Household cleaning products with harsh chemicals
  • Secondhand smoke
  • Liver products
  • Raw or undercooked meat
  • Raw shellfish
  • Unpasteruized milk products

The US Center for Disease Control and Prevention (CDC) recommends that pregnant women avoid consuming unpasteurized dairy products, as well as any food that may contain raw or undercooked meat, seafood, or eggs. These foods can also be sources of listeria bacteria. Other preventive measures include washing fruits and vegetables thoroughly before consumption and avoiding deli meats unless they are heated to an internal temperature of 165°F.

It is also important for pregnant women to avoid contact with toxic substances in the workplace. If necessary, request a change in job duties or work environment to minimize exposure and reduce any potential pregnancy complications.

It is important to pay attention to your surroundings and be mindful of potential hazards that could affect your health and the health of your developing baby.  Avoiding risky foods can decrease your risk of exposure to the salmonella bacteria and reduce your risk of listeriosis and food poisoning. Remember, prevention is key when it comes to protecting yourself from toxic substances during pregnancy.


While there is no definitive answer to whether mold can cause miscarriage, there is enough evidence to suggest that exposure to mold can have negative impacts on both the mother and the baby’s health during pregnancy. Therefore, it is important for pregnant women to take precautions and address any potential mold issues in their homes promptly. 

By following the tips mentioned above, expecting mothers can protect themselves and their growing baby from the harmful effects of mold exposure. As always, it is best to consult with a healthcare professional if you have any concerns or questions regarding mold exposure during pregnancy. Remember, prevention is key when it comes to protecting the health of you and your baby. 

Stay vigilant, keep your home clean and dry, and do not hesitate to seek professional help if needed. By taking these steps, you can ensure a safe and healthy environment for both yourself and your little one.  

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