The aim of this study was to investigate the effects of 50 Hz electromagnetic fields on human sperm motility.
Semen samples were obtained from healthy donors with ordinary sperm parameters according to WHO criteria after three days of sexual abstinence. Each experiment was repeated three times. Exposure to both sinusoidal magnetic field and two-phase square wave was performed.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
50 Hz
Exposure duration:
continuous for 3 h
|
|
|
Exposure 2:
50 Hz
Exposure duration:
continuous for 3 h
|
|
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform |
|
| Exposure duration | continuous for 3 h |
| Exposure source | |
|---|---|
| Setup | solenoid 200 mm long with a diameter of 160 mm and 511 turns; samples placed in the center of the solenoid |
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 5 mT | - | measured | - | - |
| magnetic flux density | 2.5 mT | - | measured | - | - |
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | continuous for 3 h |
| Exposure source |
|
|---|---|
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 5 mT | - | measured | - | - |
Significant increases in sperm motility were observed when spermatozoa were exposed to square wave (5 mT). This effect persisted for 21 hours after the end of the irradiation. By contrast, a 5 mT sinusoidal wave and a 2.5 mT square wave exposure did not produce any significant effect on sperm motility.
These data indicate that extremely low frequency electromagnetic field exposure can improve spermatozoa motility and that this effect depends on both wave form and applied magnetic field.
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