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In 1856 he was appointed assistant obstetric physician at Guy's Hospital and full physician in 1868. In 1888 he became obstetric physician at St Mary's Hospital, London. Hicks was the first physician to describe the bipolar and other methods of the version of a fetus. In 1872, he described the uterine contractions not resulting in childbirth now known as Braxton Hicks contractions.