en_tn/lev/12/02.md

she will be unclean

A woman whom other people must not touch because she is bleeding from her womb is spoken of as if she were physically unclean. (See: rc://en/ta/man/translate/figs-metaphor)

during the days of her monthly period

This refers to the time of the month when a woman bleeds from her womb. (See: rc://en/ta/man/translate/figs-euphemism)