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.
Key Points: 1  Autonomic symptoms are common with different types of headaches including migraine and trigeminal autonomic cephalalgias. 2  Look at yourself in the mirror when you have a headache and observe changes such as facial flushing, eyelid drooping, or tearing. Pay attention to sensations of ear fullness or nasal congestion.