The surgical process takes a great deal of time and pain, sometimes even being lethal. The different stages of implantation must occur in a precise order at different times of development, lengthening the process to a significant degree. First, the recruit receives implants, along with chemotherapy, hypnotherapy, and training necessary for allowing the functioning and development of the implanted organs. The implants transform their bodies and minds to give them near-superhuman abilities, with 19 special organs found in Space Marines and an extra 3 in their Primaris brothers.