The Claim
In pregnant C57BL/6NCrl mice, elevated thyroid hormone levels fail to activate thermogenesis in brown and white adipose tissue, whereas thyroid hormone normally activates thermogenesis in non-pregnant states of the same strain.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In pregnant C57BL/6NCrl mice, high levels of thyroid hormone do not trigger heat production in fat tissues, even though this hormone normally triggers heat production in non-pregnant mice of the same strain.
See the scientific wording
In pregnant C57BL/6NCrl mice, elevated thyroid hormone levels do not activate brown or white adipose tissue thermogenesis, despite the known thermogenic role of thyroid hormone in non-pregnant states, indicating a pregnancy-specific suppression of peripheral thermogenic pathways.
During pregnancy, hormones from the placenta and changes in the brain stop the body from using fat to make heat, even when thyroid hormone levels rise. The brain lowers its temperature setting, fat tissues stop responding to thyroid hormone signals, and the liver shifts to sending energy signals instead of heat signals. Muscles burn more energy to support the pregnancy, but they don’t produce extra heat. This keeps the baby safe from overheating.
What the research says
1 studyStudy: Pregnancy negates thyroid hormone-induced pyrexia.
In pregnant mice, extra thyroid hormone usually makes fat burn energy to make heat, but this study found that doesn’t happen—instead, the body blocks it to keep the baby safe from overheating.
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.