Hormone effects after stroke differ in animal studies
Estrogen and progesterone showed favorable results after ischemic stroke in animals, but evidence for testosterone and hemorrhagic stroke remained uncertain.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
In animal experiments, estrogen and progesterone showed favorable effects after ischemic stroke across the measures analyzed. Testosterone showed mostly null results. Findings after hemorrhagic stroke were less consistent and based on fewer studies. This abstract-based review offers a direction for further animal research, without establishing that hormone treatment benefits people after stroke.
Evidence certainty ranged from very low to moderate. The authors attributed uncertainty to limited scientific rigor and weaknesses affecting translation to humans; animal results cannot establish clinical effectiveness.
What the outcomes represent
Researchers assessed injury volume, swelling and behavioral measures, including neurological deficits, movement-related performance and cognition. These are experimental post-stroke outcomes, so favorable results should stay tied to the animal models and measures in which they appeared.
Why stroke type matters
The hemorrhagic-stroke findings depended on the model. Estrogen showed no clear effect in intracerebral hemorrhage, where progesterone findings conflicted. Progesterone showed benefit in subarachnoid hemorrhage models, but the evidence for that result had very low certainty.
The original publication
A comprehensive meta-analysis of exogenous estrogen, progesterone, and testosterone in animal models of ischemic and hemorrhagic stroke.
Kung TFC, Suerte ACC, Khiabani E et al.
Biol Sex Differ · 2026
- PubMed ID
- 41612411
- Record checked
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