The Claim
In pregnant C57BL/6NCrl mice, exogenous thyroid hormone (T3) administration causes an initial increase in core body temperature that is progressively attenuated during late gestation, resulting in a normal prepartum drop in temperature despite sustained high T3 levels, indicating a pregnancy-specific central thermoregulatory adaptation that prevents fetal hyperthermia.
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 mice, giving thyroid hormone initially raises body temperature, but as pregnancy progresses, the body reduces this effect to allow a normal drop in temperature before birth, even though hormone levels remain high, preventing the fetus from overheating.
See the scientific wording
In pregnant C57BL/6NCrl mice, exogenous thyroid hormone (T3) administration initially raises core body temperature but this effect is progressively attenuated by late gestation, allowing the normal prepartum drop in temperature despite sustained high hormone levels, indicating a pregnancy-specific central thermoregulatory adaptation that prevents fetal hyperthermia.
During pregnancy, the brain lowers its target body temperature setting and blocks the body's heat-producing systems, so even when thyroid hormone levels stay high, the mother's body does not overheat and the fetus stays safe.
What the research says
1 studyStudy: Pregnancy negates thyroid hormone-induced pyrexia.
When pregnant mice get extra thyroid hormone, their body temperature goes up at first, but their brains learn to ignore it as the pregnancy progresses, keeping the baby from overheating. The study proves this protective trick happens naturally in pregnancy.
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.