Is mold exposure safe during pregnancy?

What does the evidence say about mold exposure during pregnancy?

1. There is no proven risk to a pregnancy from exposure to airborne mold, and it is not known whether mold exposure raises the chance of miscarriage, preterm delivery before week 37, or low birth weight. 1
2. Damp indoor spaces are consistently linked to airway problems rather than pregnancy problems: pooled data show higher odds of current asthma (OR 1.56), wheeze (OR 1.50), cough (OR 1.67) and upper respiratory symptoms (OR 1.70), though the specific causative agents have not been established. 2
3. The evidence that mycotoxins from indoor mold drive health problems is described by WHO as extremely weak, and no study has shown that people in damp buildings reporting nervous system symptoms were exposed to meaningful mycotoxin levels. 3
4. Living in a home with visible mold raises the odds of developing asthma by about 29 percent, and a mold odor by about 73 percent, across 16 pooled cohort and case-control studies. 4
5. Keeping indoor humidity below 50 percent, running dehumidifiers and exhaust fans, and skipping carpet in bathrooms are the practical steps that keep mold from returning. Anyone doing the cleanup should wear an N95 mask, gloves and eye protection. 1

Is mold exposure safe in each trimester?

• First trimester. If you found mold before you knew you were pregnant, the reassuring point is that no proven pregnancy risk has been shown from airborne household mold. Arrange removal, and let someone else handle the cleanup so you are not disturbing spores.
• Second trimester. Congestion and a stuffy nose are already common now, which makes it hard to tell mold irritation apart from ordinary pregnancy rhinitis. Fix the moisture source rather than guessing, since mold comes back wherever water keeps arriving.
• Third trimester. Nesting often means deep cleaning, and this is the wrong job to take on yourself. Damp basements, bathroom grout and around windows are the usual spots, and someone else can scrub them while you keep the windows open.