“…Some of these operations were performed by trachelorrhaphy either prior to (Palmer & La Comme, 1948;Rubovits, Cooperman & Lash, 1953;Picot, Thompson & Murphy, 1958) or during pregnancy (Baden & Baden, 1957). Following Shirodkar's paper in 1955, the emphasis has been upon repair of the cervical defect during pregnancy by means of a constricting suture (Barter et al, 1958;Johnstone, 1958;McDonald, 1957;Tacchi & Snaith, 1962).…”