A secondary headache is a symptom of a disease that can activate the pain-sensitive nerves of the head. Any number of conditions â varying greatly in severity â may cause secondary headaches. Possible causes of secondary headaches include: Acute sinusitis. Arterial tears (carotid or vertebral dissections)
The fallopian tube is a crucial structure involved in successful reproduction and, like with all structures in the human body, sometimes problems occur that hinder the structure's ability to function properly.
1 Each fallopian tube is 10â13 cm (4â5 inches) long and 0.5â1.2 cm (0.2â0.6 inch) in diameter. 2  The mucous membrane lining the fallopian tube gives off secretions that help to transport the sperm and the egg and to keep them alive.