Related Experiment Videos
Cortico-adrenal function under simulated weightlessness during gestation in the rat--effects on fetal development
N Gharbi1, S El Fazaa, S Fagette
1Laboratoire de Physiologie Animale, Departement de Biologie Campus universitaire, Tunisie.
Journal of Gravitational Physiology : a Journal of the International Society for Gravitational Physiology
|April 1, 1996
Summary
Simulated weightlessness did not affect corticosterone levels in pregnant rats or their fetuses. This study suggests that spaceflight conditions do not induce stress in pregnant rats.
Area of Science:
- Physiology
- Space Medicine
- Developmental Biology
Background:
- Spaceflight poses unique challenges to physiological systems.
- Understanding the impact of altered gravity on maternal and fetal health is crucial for astronaut well-being.
- Cortico-adrenal function plays a key role in stress response and development.
Purpose of the Study:
- To investigate the effects of simulated weightlessness on the cortico-adrenal system in pregnant rats.
- To assess the impact of simulated weightlessness on fetal development.
- To determine if simulated weightlessness induces a stress response in pregnant rats.
Main Methods:
- Pregnant rats were subjected to a 20-day suspension model simulating weightlessness.
- Adrenal and plasma corticosterone levels were measured in both mothers and fetuses.
- A control group of rats was housed in standard cages for comparison.
Main Results:
- Initial growth suppression in suspended rats was followed by increased growth and food intake.
- Body mass and food intake equalized between suspended and control groups by day 18.
- No significant alterations in circulating corticosterone levels were observed in mothers or fetuses.
Conclusions:
- Simulated weightlessness does not appear to induce a stress response in pregnant rats.
- Cortico-adrenal function remains unaffected by the simulated spaceflight conditions.
- Fetal development is not adversely impacted by the simulated weightlessness in this model.