Doctors use an important blood test called a complete blood count, or CBC for short, to measure the number of each blood cell in your blood sample. If the CBC shows a low number of red blood cells, white blood cells, or platelets, your doctor may look at the cells under a microscope.
In a typical menstrual cycle, estrogen made by the maturing ovarian follicle causes the glands to grow and the endometrium to thicken (partly through an increased blood supply).This thickening of the uterine lining is called the proliferative phase of the menstrual cycle.n a typical menstrual cycle, estrogen made by the maturing ovarian follicle causes the glands to grow and the endometrium to thicken (partly through an increased blood supply).
There could be several reasons for having a prolonged menstrual cycle. Besides a possible bleeding disorder, one cause of a long bleeding period is a problem with your ovaries. If your body does not ovulate, the ovaries will still continue to make estrogen which causes the lining of the uterus to thicken even more.This is often the cause of a late period.here could be several reasons for having a prolonged menstrual cycle. Besides a possible bleeding disorder, one cause of a long bleeding period is a problem with your ovaries. If your body does not ovulate, the ovaries will still continue to make estrogen which causes the lining of the uterus to thicken even more.