Exercise ball a chair because of ergonomic considerations or biomechanical reasons. This large plastic ball, known as a "birth ball", can also be used during labour to aid the descent of the fetal head into the pelvis. Sitting in an upright position will also aid fetal positioning and is more comfortable for the woman. Sitting on the ball with arms placed on a bed, table or otherwise sturdy object for support and gently rocking the hips may help the woman during contractions and aid the natural physiological process of birth. Exercise ball An exercise ball, also known as a Swiss Ball, is
Ball (dance party) Ball (dance party) A ball is a formal dance party. Social dance forms a large part of the evening; actual ballroom dancing may or may not occur. The word "ball" derives from the Latin word "ballare", meaning "to dance"; the Latin word also developed into French "baller"—from where it swapped into languages like English or German—, and "bailar", the Spanish and Portuguese verbs for "to dance" (although all three Romance languages also know "danser", "danzar" and "dançar" respectively). Catalan uses the same word, "ball", for the dance event. A well-documented ball occurred at Kingston Lacy, Dorset, England, on 19 December