B’sha’ah tovah!
We are not familiar with a custom to immerse along with a pregnant woman. Some have the custom to immerse directly after a pregnant woman, and some consider this a
segulah.
Your wife should only do this if she feels comfortable with it. We are not aware of a halachic source for this custom, although it is in practice in some communities.
A woman who is already
tehorah, and is immersing only for spiritual purposes or as a
segulah, does not recite a
bracha on the immersion and need not undertake all the usual
preparations.
This response was updated on 8 April, 2021.
