Adeptus Astartes: Making a Marine | Warhammer 40K Lore

In our Warhammer 40K lore dive episode 45, we take a look at the gene-seed implants required to elevate a recruit to a neophyte within Chapters. We explore the use of Progenoid Glands, located in the throat and chest of each Astartes which mature after 5 and 10 years. We look at the process used to create all implants from the Gene-seed and the rough timescales involved and, in dire circumstances, the use of male criminals kept in artificial gestation chambers used to accelerate gene-seed production. We then take a deep dive into all 22 implants and look at the differences between Firstborn and Primaris marines as well as some of the mutations that have arisen in certain Chapters over the years.
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SHOW IMAGES
• List of Implants (layingdownthelore.com/wp-content/uploads/2025/…)

• Location of Implants (layingdownthelore.com/wp-content/uploads/2025/…)

• Recruit undergoing Implantation (layingdownthelore.com/wp-content/uploads/2025/…)