Nephila clavipes. Arachnology is the scientific study of spiders and related animals such as scorpions, pseudoscorpions, and harvestmen, collectively called arachnids. Those who study spiders and other arachnids are arachnologists. The word arachnology derives from Greek á¼ÏÎ¬ÏÎ½Î·, arachnÄ, spider; and -Î»Î¿Î³Î¯Î±, -logia
Heavy Menstrual Bleeding: Symptoms and Treatment. Heavy menstrual bleeding (called menorrhagia by health care professionals) is defined as soaking a pad and/or tampon every hour or less during each menstrual cycle. For many women, heavy menstrual bleeding is a huge obstacle to their lifestyles.
Determining the cause of long periods begins with a visit to the doctor. During a typical monthly menstrual cycle, a woman ovulates and her uterine lining thickens to prepare for conception. If pregnancy does not occur, the built-up tissue of the uterine lining is shed with the menstrual flow and a new cycle begins. Periods typically occur approximately every 4 weeks and last no more than 7 days. Sometimes, periods become especially heavy and last an unusually long time. Several things can cause heavy or prolonged menstrual bleeding. Possibilities include reproductive system problems and some nonreproductive disorders.