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Reproductive Health

Effects of gestational exposure to 1.95‐GHz W‐CDMA signals for IMT‐2000 cellular phones: Lack of embryotoxicity and teratogenicity in rats

No Effects Found

Ogawa K, Nabae K, Wang J, Wake K, Watanabe S, Kawabe M, Fujiwara O, Takahashi S, Ichihara T, Tamano S, Shirai T · 2009

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This study found no pregnancy or fetal harm from cell phone radiation at typical exposure levels in rats.

Plain English Summary

Summary written for general audiences

Researchers exposed pregnant rats to cell phone radiation (1.95-GHz W-CDMA signals) for 90 minutes daily during the critical period of fetal development (days 7-17 of pregnancy). They found no harmful effects on pregnancy outcomes, fetal development, or birth defects at exposure levels up to 2.0 W/kg brain SAR. This suggests that typical cell phone radiation exposure during pregnancy may not cause developmental problems in offspring.

Why This Matters

This study addresses one of parents' most pressing EMF concerns: whether cell phone use during pregnancy could harm their developing baby. The researchers used exposure levels that bracket typical cell phone use (the 2.0 W/kg brain SAR approaches the 2.0 W/kg regulatory limit for phones). While finding no adverse effects is reassuring, this represents just one study using one specific frequency and exposure pattern. The reality is that pregnancy involves complex biological processes, and developing organisms can be more sensitive to environmental influences than adults. What this means for you: while this study suggests cell phone radiation at current exposure levels may not cause obvious birth defects or pregnancy complications, the broader scientific picture on EMF and reproduction includes studies showing effects on sperm quality, hormone levels, and other reproductive parameters.

Exposure Details

SAR
0.67,3.1,2,7,0.2,1.5,0.11 W/kg
Source/Device
1.95-GHz W-CDMA
Exposure Duration
90 min/day from day 7 to day 17 of gestation

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.67,3.1,2,7,0.2,1.5,0.11 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)FCC limit is 15 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.95 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.95 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The present study was designed to evaluate whether gestational exposure to an EMF targeting the head region, similar to that from cellular phones, might affect embryogenesis in rats.

A 1.95‐GHz wide‐band code division multiple access (W‐CDMA) signal, which is one applied for the Int...

There were no differences in maternal body weight gain. No adverse effects of EMF exposure were obse...

Cite This Study
Ogawa K, Nabae K, Wang J, Wake K, Watanabe S, Kawabe M, Fujiwara O, Takahashi S, Ichihara T, Tamano S, Shirai T (2009). Effects of gestational exposure to 1.95‐GHz W‐CDMA signals for IMT‐2000 cellular phones: Lack of embryotoxicity and teratogenicity in rats Bioelectromagnetics. 30(3):205-212, 2009.
Show BibTeX
@article{k_2009_effects_of_gestational_exposure_2790,
  author = {Ogawa K and Nabae K and Wang J and Wake K and Watanabe S and Kawabe M and Fujiwara O and Takahashi S and Ichihara T and Tamano S and Shirai T},
  title = {Effects of gestational exposure to 1.95‐GHz W‐CDMA signals for IMT‐2000 cellular phones: Lack of embryotoxicity and teratogenicity in rats},
  year = {2009},
  doi = {10.1002/bem.20456},
  url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/bem.20456},
}
DOI: 10.1002/bem.20456

Cited By (43 papers)

Quick Questions About This Study

A 2009 study found no harmful effects when pregnant rats were exposed to 1.95-GHz W-CDMA cell phone radiation for 90 minutes daily during critical fetal development periods. Researchers observed no birth defects, pregnancy complications, or developmental abnormalities at exposure levels up to 2.0 W/kg brain SAR.
Research on pregnant rats exposed to W-CDMA signals (1.95-GHz frequency) showed no increase in birth defects or developmental abnormalities. The study found no differences in fetal weights, organ development, or skeletal formation compared to unexposed animals, suggesting typical cell phone use may not cause birth defects.
A controlled study exposing pregnant rats to cell phone radiation for 90 minutes daily during days 7-17 of pregnancy found no adverse effects on fetal development. Researchers observed normal pregnancy outcomes, healthy birth weights, and no increase in embryo death or resorption at this exposure level.
Research testing SAR levels up to 2.0 W/kg in pregnant rats found no harmful effects on maternal health or fetal development. The study used 1.95-GHz W-CDMA signals and monitored comprehensive pregnancy outcomes, suggesting current cell phone SAR limits may be adequate for protecting developing babies.
Pregnant rats exposed to IMT-2000 cellular phone radiation (1.95-GHz W-CDMA) showed no differences in maternal weight gain compared to unexposed animals. The study monitored body weight changes throughout pregnancy and found normal weight progression regardless of daily 90-minute radiation exposure during fetal development.