OBJECTIVE: The aim of this experimental study was to ascertain the effects of the magnetic field (created by the incubators) on the rat pups by using some behavior models. \r\nMETHODOLOGY: Forty eight rats were divided into 3 groups including, group I: control (outside the incubator), group II: cared in a non-working incubator, group III: cared in a working incubator. Each group was consisted of 16 newborn rats and kept in the incubator for a period of 30 days. After 30 days of the experiment, the rats were subject to Morris water maze test, open field test and elevated plus maze test. \r\nRESULTS: In water maze test, the rats were spent much longer duration in the platform in the study group. In open field test, duration and time percent in central zone, vertical movement were decreased, and duration and time percent in peripheral zone, micturation of the rats in the study group were increased. In elevated plus maze test, grooming, defecation and micturation were found to be increased in the study group. In the study group, most of the determinants of the behavior models were found to be significantly different from the controls. \r\nCONCLUSION: Electromagnetic field (created by the incubators) had adverse effects on newborn rats by causing depression, anxiety, and interfering spatial learning function.

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