Sperm are seldom able to fertilize an egg after 48 hours of storage in a woman. Sperm can be detected 5 days after sex, but there are generally not enough of them or they don't swim very well, so their ability to fertilize an egg is lost. It's still possible, because you only need one cell to fertilize an egg.
1 Migraine headache is a result of specific changes within the brain. It causes severe head pain that is often accompanied by sensitivity to light, sound, or smells. 2  Common symptoms of migraine are:  Eye pain.
Typical episodic migraine lasts from hours to several days. However episodic migraine can turn into CHRONIC MIGRAINE (transformed migraine) in many patients. Chronic migraine is characterized by headaches more than 15 days a month with at least 8 of the headaches having migrainous symptoms. Often other conditions are present: anxiety, depression, panic, fibromyalgia and sleep disorders. In brief: Usually 4-72 hours.