The follicular phase begins with an increase in follicle-stimulation hormone (FSH), which causes increases in luteinizing hormone (LH) and gonadotropin-releasing hormone (GnRH). Concurrent increases in estrogen levels cause increases in progesterone, stimulating proliferation of the endometrium.
Examples of insulators include plastics, Styrofoam, paper, rubber, glass and dry air. The division of materials into the categories of conductors and insulators is a somewhat artificial division. It is more appropriate to think of materials as being placed somewhere along a continuum.
As you are aware, conductors, such as copper, permit electric current to move through easily. On the other hand, insulators, such as glass, permit very little electron flow. Although every material, even conductors, offers at least some resistance to electron flow, conductors are considered to have low resistance.