TF: Repoduction

Okay I know this has crossed my mind several times and possible all of yours but, how do transformers reproduce considering there mostly an asexaul species barring the few femmes we've seen aisde.
I know most of us can think of atleast three methods but, what other methods are there? To help I will list three that I thought of off the top of my head.
Vector Sigma(G1 cartoon): This is one we are all mostly familair with considering megatron created the Stunticons body shells while the Super computer gave them life at the same time Optimus had cybertronian drones rebuilt into the aerialbots and had Vector Sigma also give them life.
The plasma energy chamber(G1: Rebirth): While I'm not sure how this would work it is mentioned by Optimus that the ealierest cybertronian where brought to life using it.
Cybercell division(G1 and G2 Comics): The first 13 where created by primus using them very method and latter it was the cause of the creation of the cybertronian empire.
Can anyone else think of anyother methods? Canon methods welcome and any theorys will be considered, please no joke methods I would like this to be serious discussion. Before any of you say it I know it's a cartoon I'm just curious on what you all think.
I know most of us can think of atleast three methods but, what other methods are there? To help I will list three that I thought of off the top of my head.
Vector Sigma(G1 cartoon): This is one we are all mostly familair with considering megatron created the Stunticons body shells while the Super computer gave them life at the same time Optimus had cybertronian drones rebuilt into the aerialbots and had Vector Sigma also give them life.
The plasma energy chamber(G1: Rebirth): While I'm not sure how this would work it is mentioned by Optimus that the ealierest cybertronian where brought to life using it.
Cybercell division(G1 and G2 Comics): The first 13 where created by primus using them very method and latter it was the cause of the creation of the cybertronian empire.
Can anyone else think of anyother methods? Canon methods welcome and any theorys will be considered, please no joke methods I would like this to be serious discussion. Before any of you say it I know it's a cartoon I'm just curious on what you all think.