Document Detail

Effects of low-frequency magnetic fields on fetal development in CBA/Ca mice.
MedLine Citation:
PMID:  9849917     Owner:  NLM     Status:  MEDLINE    
Effects of alternating magnetic fields (MFs) on the embryonic and fetal development in CBA/Ca mice were studied. Mated females were exposed continuously to a sinusoidal 50 Hz (13 microT or 0.13 mT root mean square) or a sawtooth 20 kHz (15 microT peak-to-peak) MF from day 0 to day 18 of pregnancy for 24 h/day until necropsied on day 18. Control animals were kept under the same conditions without the MF. MFs did not cause maternal toxicity. No adverse effects were seen in maternal hematology and the frequency of micronuclei in maternal bone marrow erythrocytes did not change. The MFs did not increase the number of resorptions or fetuses with major or minor malformations in any exposure group. The mean number of implantations and living fetuses per litter were similar in all groups. The corrected weight gain (weight gain without uterine content) of dams, pregnancy rates, incidences of resorptions and late fetal deaths, and fetal body weights were similar in all groups. There was, however, a statistically significant increase in the incidence of fetuses with at least three skeletal variations in all groups exposed to MFs. In conclusion, the 50 Hz or 20 kHz MFs did not increase incidences of malformations or resorptions in CBA/Ca mice, but increased skeletal variations consistently in all exposure groups.
H Huuskonen; J Juutilainen; A Julkunen; J Mäki-Paakkanen; H Komulainen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioelectromagnetics     Volume:  19     ISSN:  0197-8462     ISO Abbreviation:  Bioelectromagnetics     Publication Date:  1998  
Date Detail:
Created Date:  1999-02-18     Completed Date:  1999-02-18     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8008281     Medline TA:  Bioelectromagnetics     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  477-85     Citation Subset:  IM    
National Public Health Institute, Division of Environmental Health, Laboratory of Toxicology, Kuopio, Finland.
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MeSH Terms
Body Weight
Bone Marrow Cells / ultrastructure
Bone and Bones / embryology
Cell Nucleus / ultrastructure
Congenital Abnormalities / etiology
Embryo Implantation
Embryonic and Fetal Development*
Erythrocytes / ultrastructure
Fetal Death / etiology
Fetal Resorption / etiology
Fetus / anatomy & histology
Litter Size
Mice, Inbred CBA
Mice, Inbred Strains

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