Medical/biological study (experimental study)

GSM radiocellular telephones do not disturb the secretion of antepituitary hormones in humans med./bio.

By: de Seze R, Fabbro-Peray P, Miro L

Published in: Bioelectromagnetics 1998; 19 (5): 271-278

Exposure	Parameters
Exposure 1: 890–900 MHz Modulation type: pulsed Exposure duration: repeated daily exposure for 2 h/day, 5 days/week, for 4 weeks	power: 2 W peak value power: 250 mW average over time

Frequency	890–900 MHz
Type	electromagnetic field
Exposure duration	repeated daily exposure for 2 h/day, 5 days/week, for 4 weeks

Exposure source	cellular phone
Setup	Listening was always performed with the same ear and at the same place in the room. The devices were only used while receiving sound but because of the missing power control system, they were always emitting at maximum power.
Additional info	Subjects were their own control.

Measurand	Value	Type	Method	Mass	Remarks
power	2 W	peak value	-	-	-
power	250 mW	average over time	-	-	-

Exposed system:

Investigated system:

Investigated organ system:

Time of investigation:

Findings indicated that all hormone concentrations remained within normal physiologic ranges. A difference was not revealed among the nine weekly samples in five of six hormones investigated. There was a significant change only in thyrotropin concentration (21% decrease on the seventh sampling). Because this alteration recovered during the postexposure period, it is concluded that one month of intermittent exposures to radiofrequency irradiation from a cellular telephone does not induce a long-lasting effect on the hormone secretion rate of the anterior pituitary gland in humans.

Study character:

Research Center of France Télécom (CNET; Centre National d'Etudes des Télécommunication), France

Geronikolou SA et al. (2015): Frequent cellular phone use modifies hypothalamic-pituitary-adrenal axis response to a cellular phone call after mental stress in healthy children and adolescents: A pilot study
Augner C et al. (2010): Effects of Exposure to GSM Mobile Phone Base Station Signals on Salivary Cortisol, Alpha-Amylase, and Immunoglobulin A
Mortazavi S et al. (2009): Alterations in TSH and Thyroid Hormones following Mobile Phone Use
Djeridane Y et al. (2008): Influence of electromagnetic fields emitted by GSM-900 cellular telephones on the circadian patterns of gonadal, adrenal and pituitary hormones in men
de Seze R et al. (2001): Evaluation of the Health Impact of the Radio-Frequency Fields from Mobile Telephones
Mann K et al. (1998): Effects of pulsed high-frequency electromagnetic fields on the neuroendocrine system