HomeOral Surgery In intra uterine life the mandible start to develop but clavicle (collar bone) start before it publisher :NIL NAM -June 22, 2017 In intra uterine life the mandible start to develop but clavicle (collar bone) start before it. A. True B. False. Labels Oral Surgery Facebook Twitter Share:In intra uterine life the mandible start to develop but clavicle (collar bone) start before it Facebook Twitter WhatsApp Pinterest LinkedIn Reddit Tumblr Telegram Email