Because water is not susceptible to ritual impurity, stains found in water do not render a woman niddah (please see our articles on stains for a more detailed explanation). Therefore, you are not halachically required to take any particular steps. However, we recommend abstaining from relations for a day from the staining in order to be sure that a flow does not begin during relations. This is a recommendation, and not a strict halachic requirement.

Yoatzot Halacha Fertility Counselors offer free consultations to women and couples undergoing fertility treatment (please see here if you are interested).

B’hatzlacha!

This response was updated on 4 May, 2021.