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Created on : 07 Oct 2004
Modified on : 02 Dec 2007

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Bibliographical entry (without author) :

The transition from fetus to neonate - an endocrine perspective. Acta Paediatr Suppl 1999 Feb;88(428):7-11

Author(s) :

Gluckman PD, Sizonenko SV, Bassett NS.

Year of publication :

1999

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Abstract (English)  :

(Research Centre for Developmental Medicine and Biology, University of Auckland, School of Medicine, New Zealand.)

The transition from fetus to neonate involves three phases: late gestation, parturition and the processes needed to establish independent homoeostatic regulation after separation from the placenta. These phases are regulated by a series of fetal and placental endocrine events. Glucocorticoids have an important role in the preparation for birth, including involvement in lung and cardiac development, and the maturation of enzymes in a variety of pathways. Fetal cortisol production is, in turn, also under hormonal control. Parturition is a complex process, which is still poorly understood in humans. The final steps are largely dependent on the effect of prostaglandin F2 alpha on the myometrium associated with increased oxytocin activity. The transition to birth is accompanied by changes in respiration, circulation, glucose homoeostasis, and the onset of independent oral feeding and thermoregulation. Several examples of endocrine components of the transition from fetal to neonatal life are reviewed here: the role of prostanoids, the onset of thermogenesis, and changes in the thyroid hormone and growth hormone axes. The effects of hormone levels on prematurity and growth retardation are also discussed.

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Keywords :

➡ hormones ; oxytocin ; pain

Author of this record :

Bernard Bel — 07 Oct 2004