Urinary incontinence and, less commonly, fecal incontinence, plague some new mothers shortly after giving birth. The inadvertent passage of urine, especially when laughing, coughing or straining, usually is caused by the stretching of the base of the bladder during pregnancy and delivery.
Best Answer: The focus of an earthquake is the point beneath Earth's surface where rock breaks under stress and the plates shift and that is what causes the earthquake. An earthquake is when the surface of the earth is shaking because of rapid movement of the rocky outer layer of the earth.
Focus (optics) In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge. Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle. This non-ideal focusing may be caused by aberrations of the imaging optics.