Block copolymers (B1) comprising polyester and polyether units, where (B1) comprises diblock copolymer of A-B type or triblock copolymer of A-B-A type where A represents polyester block and B represents polyether block, is new. An independent claim is included for an implant comprising the block copolymer (B1).本發明係關於具有聚醚及聚酯單元之可吸收性嵌段共聚物用於製備適用於人類或動物體之外科用植入體的用途,及所論及之該等嵌段共聚物。根據本發明所用之嵌段共聚物及根據本發明為新穎者之嵌段共聚物的特徵在於高機械強度及快速吸收動力學。