Seven days before term, pregnant guinea-pigs were subjected to a psychosomatic stress. Adrenocorticotrophin (ACTH), cortisol and aldosterone concentrations increased in maternal and fetal plasma immediately after stress. In the offspring born from prenatally-stressed mothers that were resubjected to stress, the increases in plasma ACTH and cortisol level were lower than in the control offspring. Plasma aldosterone levels increased after stress in 12 days-old pups but did not change neither in 50 days-old animals nor in 12 days-old guinea-pigs born of prenatally stressed mothers. Thus prenatal stress of mother resulted in lowered response of pituitary-adrenocortical axis of offspring subjected to stress.
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