The Claim
In fetal sheep during late gestation, the natural increase in glucocorticoid and thyroid hormone concentrations is associated with increased mitochondrial content, abundance of electron transport chain complexes, and enhanced oxidative phosphorylation capacity in skeletal muscle, liver, heart, and brain tissues.
What the research says
Roughly balanced
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During late pregnancy in sheep fetuses, rising levels of glucocorticoid and thyroid hormones coincide with higher mitochondrial density, more electron transport chain proteins, and greater energy production capacity in skeletal muscle, liver, heart, and brain tissues.
See the scientific wording
In fetal sheep, the natural rise in glucocorticoid and thyroid hormone concentrations during late gestation is associated with increased mitochondrial content, electron transport chain complex abundance, and oxidative phosphorylation capacity in skeletal muscle, liver, heart, and brain tissues, preparing the fetus for the metabolic demands of birth.
As the fetus nears birth, rising stress and thyroid hormones activate energy factories inside cells of the muscle, liver, heart, and brain. These hormones turn on genes that build more mitochondria and assemble the protein machines that make energy. The stress hormone also triggers the conversion of an inactive thyroid form into its active version, which further boosts energy production. This ensures the fetus has enough power to breathe, move, and stay warm right after birth.
What the research says
1 studyAs a baby sheep gets ready to be born, its body releases more stress and thyroid hormones, which tell its cells to make more energy factories (mitochondria) in muscles, liver, brain, and heart—so it has enough power to breathe and move after birth.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.