Unlabelled: Objectives and the aim of the study was electron-microscopy morphological estimation of the human placental cotyledon after 180 minutes of dual closed perfusion in vitro.

Materials And Methods: In the experimental group the cotyledons were exposed to variable magnetic field of 2 mT magnetic induction and 50 Hz frequency. The control group K (10 perfusions) was not subjected to magnetic field while the experimental group B (10 perfusions) was influenced by magnetic field.

Results: It was found that homogeneous variable magnetic field disturbs the ultrastructure of the nuclei and cytoplasma and it increases the density of the vascular-epithelial membrane of villi cells of human placenta in vitro.

Conclusion: Variable sinusoildal, magnetic field of 2 mT magnetic induction and 50 Hz frequency disturbs the ultrastructure of the nuclei and cytoplasma and it increases the density of the vascular-epithelial membrane of villi cells of human placenta in vitro after 180 minutes of dual closed perfusion in vitro.

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