  It takes a mallard duck 28-30 days for the eggs to hatch. All of the eggs will hatch within 24 hours and they will then head for water.Never to return to the nest. 3 people found this useful. It takes a mallard duck 28-30 days for the eggs to hatch. All of the eggs will hatch within 24 hours and they will then head for water. Never to return to the nest. 3 people found this useful.
The two main causes of strokes are termed ischemic and hemorrhagic and involve blood vessels in the brain. Ischemic strokes comprise about 80% to 85% of all strokes. With an ischemic stroke, a blood vessel in the brain becomes clogged with a clot just like the clogged arteries in the heart. With a hemorrhagic stroke, a blood vessel in the brain actually bursts or leaks. Hemorrhagic strokes tend to be more serious.
A stroke occurs when the flow of blood to part of the brain is significantly reduced or blocked. Often, this results in the death of brain cells, which can lead to permanent damage or even death. The most common cause of stroke is a blood clot. AFib puts patients at an increased risk for stroke because blood may not be properly pumped out of the heart, which may cause it to pool and form a clot. This clot can then travel to the brain and block the flow of blood to part of the brain which can result in a stroke.