sam2 and GAW- the gemara needs a limud and its a major sugya about kds of nidda not being mamzeirim.
Aware. Thank you, but irrelevant to our current question.
Sam or Toi: A source for Yichud? Mashmaos in Rambam is that Niddah is included & Dioraysah, but I would love to see an explicit source.