Reply To: Kashas on the Parsha

I’m refreshing this post b/c i have a new question that i don’t know the answer to and maybe the CR can help me.

In this weeks parsha the passuk says Chadal lihiyos Sarah orach K’nashim to which rashi says that dam niddah stopped

but in Noach where it says Vatihi Sarai Akara lo yalad

the gemera in yevomos says either she was an aylonis, she was a tumtum or she didnt have a rechem. If this is so, then how can she have dam niddah in any of those 3 cases