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[Pituitary somatotropic function of newborn infants]
Ontogenez
|January 1, 1976
Summary
Hypophysial somatotrophic hormone levels in newborns are lower initially, then rise sharply within the first day of life. This study examines infant hormone dynamics and hypothalamic-hypophysial system function post-birth.
Area of Science:
- Endocrinology
- Neonatal Physiology
- Human Development
Background:
- The transition from fetal to neonatal life involves significant physiological changes.
- Hormonal regulation is critical for infant growth and development.
Purpose of the Study:
- To investigate the concentration of hypophysial somatotrophic hormone (growth hormone) in newborns.
- To analyze the dynamic changes in growth hormone levels during the early neonatal period.
- To discuss the functioning of the hypothalamic-hypophysial system in neonates.
Main Methods:
- Blood samples collected from umbilical cord vessels at birth.
- Peripheral blood samples taken from newborns within 2 hours and over 1-9 days of life.
- Quantification of hypophysial somatotrophic hormone content.
Main Results:
- Growth hormone levels were significantly lower in newborns at 2 hours compared to fetal levels.
- A sharp increase in growth hormone was observed by the end of the first day of life.
- Hormone levels gradually decreased during the subsequent days of the neonatal period.
Conclusions:
- The hypothalamic-hypophysial system exhibits dynamic changes in growth hormone secretion during early neonatal life.
- These hormonal shifts are crucial for adapting to extrauterine existence and initiating growth.
- Further research into neonatal endocrine function is warranted.