The generation of matter-antimatter asymmetry remains still poorly understood. Same is true about the generation of matter. In TGD framework the generation of matter can be explained in terms of cosmic strings carrying dark energy identified as K\ähler magnetic energy. Their decay to ordinary and dark matter would be the analog for the decay of the inflaton field to matter and matter-antimatter asymmetry would be generated in this process. The details of the process have not been considered hitherto. The attempt to see whether the counterparts for the visions about lepto-genesis from right-handed inert neutrinos, baryo-genesis from leptons, and generation of antimatter asymmetry claimed to be possible in standard model framework, could make sense in TGD led to a much more detailed vision about how the primordial cosmic strings carrying only right handed neutrinos could decay to ordinary matter. It also turned out that the "official" version of TGD for which quarks and leptons correspond to different chiralities of imbedding space spinors is enough to achieve also matter antimatter asymmetry.