[Perinatal development of adrenal gland adrenaline and noradrenaline in the fetus, newborn and mother guinea pig].

The adrenaline concentration in the adrenal gland of the Guinea-Pig rose before parturition in the foetus, then increased markedly in the newborn. The fall which occurred between hours 1.30 and 6 post-partum went on until the end of the first postnatal day. At birth, the adrenal potency to synthesize adrenaline was similar to that of the adult.