(This is inspired by my story on Wattpad: The Legacy of the Primes, in progress, by marionnoa15)

The Primes were expected to remain chaste: that is, virgins. Their sexual intimacy was only with Primus. Nevertheless, they managed to give birth to children. This method is called: "Procreation" or "The Procreation Ritual". A Prime received an already fertilized embryo, by pipette, into his uterus from an unknown mother and father.

After insertion, the Prime continues to work for the next 9 months of pregnancy. It then delivers the baby. The Prime receives her baby on the chest and kisses it, then the Prime-Medics separate the mother from the child. No family connection. Furthermore, the Prime will never know the face or name of his child.

They didn't receive the embryo until their third year as Prime. And it was Optimus's turn. He lay on the table, waiting for the doctor and the pipette. His eyes stared at the ceiling, decorated with a pregnant Primus body

The door opened to reveal the doctor, holding the pipette. He didn't smile like most Primes. "Can you spread your legs please?" He asked, Optimus spread his legs. The doctor slipped between. He sat down on a chair to be level and pushed the pipette inside. Optimus felt a slight tingling but said nothing. The doctor removed the pipette once inserted. "Everything is fine. You must do as little effort or stress as possible for at least a week. You can go." Optimus thanked the doctor and left

Optimus was exactly 5 months old, you were in perfect health. We told Optimus he was going to have a child bigender :you were a girl AND a boy at the same time which was rare. Optimus would work mostly in the library, or do gentle work, to make sure he would deliver you without any problems. At that moment, the Prime was in in the library, reading a book when Mere Zeta (The 13 Primes and former Primes are called Mother) entered.

"Hello Brother Optimus, how are you and this baby?" Mother Zeta asked

"Hello, Mother Zeta. I'm feeling better...and so is this baby." Optimus answered

"That's good. Remember not to get attached to that child. Only Primus can love him." Mother Zeta stroked Optimus's cheek