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Are you yoitze the Mitzva of PeoriaPirya Verivya with children born out of wedlock

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Are you yoitze the Mitzva of Peoria Verivya with children born out of wedlock

I know there is a machlokes Rishonim (rambam / Rosh) if Kedushin is a Mitzva or Hecsher Mitzva for Pirya Verivya. Say one has children out of wedlock, is that Mitzva fulfilled or do we say its a Mitzva Haba Bavaira?