Lawn and garden pesticides during pregnancy

What does the evidence say about spraying your own lawn or garden with pesticide during pregnancy?

1. Pesticides can enter the body by being breathed in, absorbed through the skin, or eaten if they land on food, and MotherToBaby specifically advises avoiding mixing and applying pesticides yourself during pregnancy if possible, recommending a well-ventilated area plus protective equipment such as a respirator, long sleeves, long pants, and gloves if you cannot avoid it. 1
2. MotherToBaby separately states that it is unlikely that having your home or yard managed by a professional pesticide company results in a high enough exposure to raise pregnancy risk, drawing a clear line between hiring the work out and doing the mixing and applying yourself. 1
3. Biomonitoring of a related lawn and agricultural herbicide found household members who did not personally apply it stayed mostly below 1 part per billion in urine, while people who mixed, loaded, or applied it themselves measured anywhere from 5 to 45 parts per billion on average, with individual peaks as high as 744 to 2,500 parts per billion depending on the setting, leading researchers to conclude that direct handling, not simply living nearby, is the strong determinant of exposure. 2
4. EPA's own personal protective equipment requirements for people who mix, load, or apply pesticides call for handlers to be provided appropriate, clean, functioning gear, with specific glove and respirator requirements set by the individual product's label rather than a single blanket rule, meaning the label on whatever product you are using is the actual source to check. 3
5. EPA maintains separate exposure-assessment methods specifically for non-occupational, residential pesticide uses including lawn and garden care, foggers, and pet care options, and its residential turf method produces higher estimated skin exposure than some other scenarios precisely because it is built to reflect the real activities people do after managing their own yard. 4

Is spraying your own lawn or garden with pesticide safe in each trimester?

• First trimester. Organs are forming fastest now, so this is the trimester to most actively hand the sprayer to someone else if you have that option, rather than the one to relax the precaution.
• Second trimester. If you are doing any of your own mixing or applying, a well-ventilated time of day, chemical-resistant gloves, and washing exposed skin right after are the practical steps that matter most, since research on similar herbicides finds the person doing the mixing and applying carries far more of the exposure than anyone nearby.
• Third trimester. Ongoing garden maintenance, weeding, or harvesting in an area you managed yourself weeks earlier is a lower-intensity exposure than the application itself, but common lawn herbicides can persist in soil for weeks, so gloves for regular garden work in a recently managed bed are still a reasonable habit.