How does aspirin cause miscourage?

Aspirin can potentially lead to miscarriage primarily due to its effects on blood clotting and uterine function. It inhibits the production of thromboxane, a substance that promotes blood clotting and vasoconstriction, which can disrupt normal blood flow to the placenta. Additionally, high doses of aspirin may interfere with the implantation of the embryo or the maintenance of the pregnancy. However, it's important to note that low-dose aspirin is sometimes prescribed in certain cases to reduce miscarriage risk due to its blood-thinning properties.