The standard tests performed in a prenatal visit do not make a woman niddah. If you are concerned about discharge appearing on a vaginal ultrasound probe, it is permissible to ask the doctor or technician not to look for discharge on the probe. See here for further information.

Usually, a woman observes all her regular veset days the first month of her pregnancy. However, our Rabbinic Supervisor, Rav Kenneth Auman, maintains that there is room to be lenient with vesatot in pressing situations once a woman has had a positive pregnancy test. If the timing works out so that you can perform your bedikah prior to your appointment, that would be best. However, if your appointment creates concerns regarding a bedikah on your onat haflagah, then you may omit the bedikah, while still refraining from relations over the veset. You would go on to observing any subsequent vesatot this cycle, unless they pose a specific concern as well.

As always, you may wear a colored undergarment or a pantiliner on your veset day, which would help avoid questions with staining.

Blood found after certain gynecological procedures, even on a bedikah cloth, can sometimes be attributed to the procedure and do not affect a woman's niddah status. Learn more here.

Please be in touch if you have any further questions.

We have some appropriate books listed on our website. You may also be interested in reviewing our relevant articles on pregnancy, childbirth, postpartum, and breastfeeding. The best gift you can give your child is a mother who loves God, her husband, and herself. Working on developing and enhancing those three relationships is a lifetime project, but a lot can be accomplished over nine months. BeSha’ah tovah!

This response was updated on 30 December, 2025.