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.
Several other hormones play a. role in reproduction. Prostaglandin. is secreted by the uterus and causes. the CL on the ovary to regress so. follicles can develop and create. estrogen to trigger a new heat. cycle.