Mosquito Repellents & Pregnancy: Safe Options & Precautions

Preventing mosquito bites during pregnancy reduces risk of Zika, West Nile, dengue, and malaria. EPA‑registered repellents are safe when used as directed.

Recommended Active Ingredients

DEET (N,N‑diethyl‑meta‑toluamide)

• Concentration: 20–30% provides 5–8 hours protection. Higher % lasts longer but not stronger.
• Safety: Extensive studies support use in 2nd/3rd trimesters; 1st trimester data limited but no birth defects linked. AAP approves ≥2 months.

Picaridin (Icaridin, 20%)

• Odorless, non‑greasy, similar efficacy to DEET. Safe in pregnancy. Less plastic damage.

IR3535 (Ethyl butylacetylaminopropionate, 20%)

• Good safety profile, slightly shorter duration. Approved in pregnancy.

Oil of Lemon Eucalyptus (OLE / PMD, 30%)

• Plant‑derived, EPA‑registered. Not for children <3 years. Safe in pregnancy; shorter duration (~6 hrs).

Ingredients to Avoid or Use Cautiously

• Permethrin: For clothing/gear only, not skin.
• Essential oils (citronella, peppermint, etc.): Unregistered, variable efficacy, short duration, skin irritation risk.
• Wristbands, ultrasonic devices, vitamin B1: Not effective.

Application Best Practices

1. Apply to exposed skin only; avoid eyes, mouth, cuts.
2. Apply sunscreen first, let dry, then repellent.
3. Reapply per label (after swimming, sweating, wiping).
4. Wash off with soap/water when indoors.
5. Do not spray directly on face—spray hands, then pat.

Non‑Chemical Protection

• Long sleeves/pants (light‑colored, loose).
• Permethrin‑treated clothing (pre‑treated or DIY).
• Window/door screens; bed nets if unscreened.
• Eliminate standing water (buckets, pots, gutters).
• Stay indoors at peak biting times (dawn/dusk for many species).

Travel Considerations

Check CDC travel notices for destination‑specific risks (Zika, malaria). Malaria prophylaxis may be needed in addition to repellents.

Consistent, correct use of EPA‑registered repellents is the cornerstone of bite prevention in pregnancy.