8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.

EMF Research Studies

Browse 8,700 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.

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Showing 1,859 studies (Rodent Studies)

Prolonged 3.5 GHz and 24 GHz RF-EMF Exposure Alters Testicular Immune Balance, Apoptotic Gene Expression, and Sperm Function in Rats

Syed Taha SMA et al. · 2025

Researchers exposed male rats to 5G frequencies (3.5 GHz and 24 GHz) for 60 days and found significant damage to sperm quality and testicular function. Both frequencies reduced sperm motility and concentration, with 24 GHz causing more severe effects including immune system disruption. The damage worsened with longer daily exposure times.

An 1800 MHz Electromagnetic Field Affects Hormone Levels, Sperm Quality, and Behavior in Laboratory Rats (Rattus norvegicus)

Unknown authors · 2025

Researchers exposed laboratory rats to 1800 MHz electromagnetic fields (similar to cell phone frequencies) for 12 weeks and found significant hormonal disruptions, reduced sperm quality, and increased anxiety behaviors. The effects included elevated stress hormones, decreased thyroid function, and impaired reproductive health that persisted for weeks after exposure ended.

Özyılmaz C, Daşdağ S, Oktay MF, Ulukaya E, Erkısa Genel M, Emre F, Yeğin K

Unknown authors · 2025

Turkish researchers exposed pregnant rats to WiFi-frequency radiation (2.45 GHz) throughout pregnancy, then examined their offspring's thyroid glands one year after birth. The study found significant thyroid damage including increased cell death, DNA breaks, and tissue scarring in animals whose mothers were exposed during pregnancy. This suggests prenatal WiFi exposure may cause lasting thyroid problems that persist into adulthood.

Effects of 700MHz radiofrequency radiation (5G lower band) on the reproductive parameters of female Wistar rats

Unknown authors · 2025

Researchers exposed female rats to 700MHz 5G radiation for either 10 days (6 hours daily) or 60 days (4 hours daily) to study reproductive effects. While hormone levels and DNA remained mostly normal, long-term exposure caused oxidative stress in ovaries and tissue changes including cystic follicles. The findings suggest prolonged 5G exposure may harm female reproductive organs through cellular damage.

Gupta V, Srivastava R

Unknown authors · 2025

Researchers studied how gut bacteria imbalances worsen bone loss in postmenopausal osteoporosis by disrupting immune cell function. They found that restoring healthy gut bacteria with probiotics improved bone density and strength by rebalancing the immune system. This reveals a new connection between gut health, immunity, and bone strength.

Gautam R, Jha N, Tomar AK, Nirala JP, Arora T, Rajamani P

Unknown authors · 2025

Researchers exposed male rats to 35.5 GHz millimeter waves (5G frequency) for 2 hours daily over 60 days. The radiation significantly reduced sperm count and viability while increasing DNA damage and oxidative stress in testicular tissue. This study adds to growing evidence that 5G frequencies may harm male fertility through cellular damage mechanisms.

Altered development in rodent brain cells after 900MHz radiofrequency exposure

Unknown authors · 2025

Researchers exposed developing rats to 900MHz cell phone radiation at levels considered safe by current regulations (0.08 and 0.4 W/kg SAR). The study found significant changes in brain development, including reduced brain growth factors, fewer new brain cells, disrupted nerve connections, and DNA damage in neural stem cells. These effects occurred at exposure levels typical of everyday cell phone use.

Altun G, Kaplan S

Unknown authors · 2025

This study exposed pregnant rats to 900 MHz cell phone radiation (similar to 2G/3G frequencies) for 2 hours daily throughout pregnancy, then examined brain changes in their male offspring. Researchers found fewer neurons in key appetite-control brain regions, increased anxiety behaviors, and altered expression of genes linked to obesity. Neither melatonin nor omega-3 supplements protected against these effects.

The CB1R of mPFC is involved in anxiety-like behavior induced by 0.8/2.65 GHz dual-frequency electromagnetic radiation

Unknown authors · 2025

Scientists exposed mice to dual-frequency electromagnetic radiation at 0.8/2.65 GHz (similar to cell phone and WiFi frequencies) and found it caused significant anxiety-like behavior. The radiation disrupted the brain's endocannabinoid system, particularly reducing CB1 receptors in the prefrontal cortex that help regulate emotions. This study provides new evidence that common wireless frequencies may affect mental health through specific brain chemistry changes.

An 1800 MHz Electromagnetic Field Affects Hormone Levels, Sperm Quality, and Behavior in Laboratory Rats (Rattus norvegicus)

Unknown authors · 2025

Researchers exposed laboratory rats to 1800 MHz electromagnetic fields (cell phone frequency) for 12 weeks and found significant hormonal disruptions, reduced sperm quality, and increased anxiety behaviors. The effects included elevated stress hormone levels, decreased thyroid function, and impaired reproductive health that persisted for weeks after exposure ended.

Narayanan SN, Kumar RS, Kumar N, Prabhakar P, Nayak SB, Bhat PG

Unknown authors · 2025

Researchers exposed young rats to 900 MHz cell phone radiation for one hour daily over four weeks and found significant brain and stress system damage. The radiation caused increased fearfulness, brain cell death in the hippocampus (crucial for memory), and damage to stress hormone-producing glands. This suggests cell phone frequencies may disrupt normal fear responses and brain development.

Single exposure to near-threshold 5G millimeter wave modifies restraint stress responses in rats

Unknown authors · 2025

Researchers exposed rats to 28 GHz millimeter waves (5G frequencies) at power levels near current safety thresholds and measured stress hormone responses. They found that even single exposures altered stress hormones like corticosterone and noradrenaline for days afterward. This suggests 5G frequencies can trigger biological stress responses at levels currently considered safe.

Brain & Nervous SystemNo Effects Found

Repeated Head Exposures to a 5G-3.5 GHz Signal Do Not Alter Behavior but Modify Intracortical Gene Expression in Adult Male Mice

Unknown authors · 2025

Researchers exposed mice to 5G signals at 3.5 GHz for six weeks, finding no changes in behavior, memory, or anxiety levels. However, the radiation did alter gene expression in brain cells, particularly affecting genes related to brain communication pathways. The study shows 5G can cause biological changes even when behavioral effects aren't obvious.

Hancı H, Yenilmez E, Demir S, Yıldırım M, Gedikli Ö, Kaya H

Unknown authors · 2025

Researchers exposed pregnant rats to 900 MHz electromagnetic fields (similar to cell phone radiation) for one hour daily throughout pregnancy. They found that this prenatal EMF exposure caused lasting damage to peripheral nerve development in the offspring, with structural changes still visible when the rats reached adulthood. While nerve function wasn't completely impaired, the study demonstrates that EMF exposure during pregnancy can cause permanent developmental changes.

The effects of short-term and long- term 2100 MHz radiofrequency radiation on adult rat auditory brainstem response

Er H, Basaranlar G., Derin N., Kantar D, Ozen S. · 2025

Researchers exposed adult rats to 2100 MHz radiofrequency radiation (the frequency used by 3G cell phones) for either 1 week or 10 weeks, 2 hours daily. Short-term exposure delayed auditory brainstem responses and caused brain oxidative damage, while longer exposure with rest days showed no harmful effects. This suggests acute cell phone radiation exposure may temporarily impair hearing function.

Altered development in rodent brain cells after 900MHz radiofrequency exposure

Unknown authors · 2025

Researchers exposed developing rats to 900MHz cell phone radiation at levels considered safe by current regulations (0.08 and 0.4 W/kg SAR). They found significant changes in brain development, including reduced brain growth factors, altered cell division, and disrupted formation of neural connections. The study suggests developing brains may be particularly vulnerable to wireless radiation even at supposedly safe exposure levels.

Altun G, Kaplan S

Unknown authors · 2025

Researchers exposed pregnant rats to 900 MHz cell phone radiation for 2 hours daily and found their offspring had fewer brain neurons in areas controlling appetite, along with increased anxiety behaviors. The study also examined whether melatonin or omega-3 supplements could protect against these effects, but found limited benefits.

Prolonged 3.5 GHz and 24 GHz RF-EMF Exposure Alters Testicular Immune Balance, Apoptotic Gene Expression, and Sperm Function in Rats

Syed Taha SMA et al. · 2025

Malaysian researchers exposed male rats to 5G frequencies (3.5 GHz and 24 GHz) for 60 days and found both frequencies damaged sperm quality and disrupted testicular immune function. The 24 GHz millimeter waves reduced sperm concentration and viability, while 3.5 GHz primarily affected sperm movement. Longer daily exposures (7 hours vs 1 hour) made the damage worse.

Radiofrequency electromagnetic field ınhibits HIF-1 alpha and activates eNOS signaling to prevent intestinal damage in a model of mesenteric artery ischemia in rats

Unknown authors · 2025

Researchers exposed rats with blocked intestinal blood flow to radiofrequency electromagnetic fields, finding that RF-EMF treatment protected against tissue damage and inflammation. The electromagnetic exposure appeared to improve blood vessel function and reduce the harmful effects of oxygen deprivation in intestinal tissue. This suggests RF-EMF might have therapeutic potential for certain ischemic conditions.

Repeated Head Exposures to a 5G-3.5 GHz Signal Do Not Alter Behavior but Modify Intracortical Gene Expression in Adult Male Mice

Unknown authors · 2025

Researchers exposed mice to 5G signals at 3.5 GHz frequency for six weeks, finding no changes in behavior or memory but detecting subtle gene expression changes in brain tissue. The study found less than 1% of brain genes were affected, with changes concentrated in areas handling nerve communication and cellular energy production.

Reproductive HealthNo Effects Found

Effects of 700MHz radiofrequency radiation (5G lower band) on the reproductive parameters of female Wistar rats

Unknown authors · 2025

Researchers exposed female rats to 700MHz 5G radiation for either 10 days (6 hours daily) or 60 days (4 hours daily) to study reproductive effects. While hormone levels and fertility cycles remained mostly normal, long-term exposure caused oxidative stress in ovaries and tissue changes including cystic follicles. The findings suggest prolonged 5G exposure may harm reproductive organs through cellular damage.

DNA & Genetic DamageNo Effects Found

Ilgaz NS, Karamazı Y, Emre M, Toyran T, Karaoğlan Ö, Emre T, Dönmez Kutlu M, Öksüz Üçkayabaşı H, Aydın Ç, Yılmaz MB

Unknown authors · 2025

Turkish researchers exposed rats to 6 GHz radiofrequency radiation (the frequency used in WiFi 6E) for 4 hours daily over 42 days and found liver tissue damage. While DNA damage wasn't statistically significant, the study revealed clear tissue inflammation, cell death, and blood vessel congestion in exposed animals. This is the first study to examine biological effects at this specific frequency.

Hancı H, Yenilmez E, Demir S, Yıldırım M, Gedikli Ö, Kaya H

Unknown authors · 2025

Researchers exposed pregnant rats to 900 MHz electromagnetic fields (similar to cell phone frequencies) for one hour daily throughout pregnancy, then examined their offspring's nerve development into adulthood. The study found that prenatal EMF exposure caused lasting structural damage to peripheral nerves, though not severe enough to impair nerve function. This suggests cell phone radiation during pregnancy may affect developing nervous systems in ways that persist long-term.

Gelenli Dolanbay E, Mert T, Caliskan Bender G, Bektas H, Uslu U, Fernandez- Rodriguez CE, Dasdag S

Unknown authors · 2025

Scientists exposed pregnant rats to 3.5 GHz radiofrequency radiation (similar to 5G frequencies) and examined the male offspring at 12 months old. The study found significant damage to sperm production, including smaller testicular structures, abnormal sperm, and increased cell death. This suggests that wireless radiation exposure during pregnancy may have lasting effects on male fertility.

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