Study type: Medical/biological study (experimental study)

Effects of low-frequency magnetic fields on fetal development in rats. med./bio.

Published in: Bioelectromagnetics 1993; 14 (3): 205-213

Aim of study (acc. to author)

To investigate the effects of different magnetic field exposures on the embryonic and fetal development in rats in vivo.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 50 Hz
Exposure duration: continuous for 20 days
Exposure 2: 20 kHz
Modulation type: pulsed
Exposure duration: continuous for 20 days

Exposure 1

Main characteristics
Frequency 50 Hz
Type
Waveform
Exposure duration continuous for 20 days
Exposure setup
Exposure source
Setup pairs of rectangular coils 0.425 x 1.205 m, 0.155 m apart, cages inside pair of coils
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 35.6 µT peak-to-peak value measured - -
magnetic field strength 10 A/m average over time measured - -

Exposure 2

Main characteristics
Frequency 20 kHz
Type
Waveform
  • sawtooth-shaped
Exposure duration continuous for 20 days
Modulation
Modulation type pulsed
Rise time 5 µs
Fall time 45 µs
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 15 µT peak-to-peak value measured - -
magnetic field strength 12 A/m average over time measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

No adverse effects of exposure were observed in dams. In the 50 Hz group the mean number of implantations and living fetuses per litter were statistically significant increased. In bothe groups the incidence of fetuses with minor skeletal anomalies were statistically significant increased.

Study character:

Study funded by

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