Must a Pregnant Woman Fast on Tisha B'Av?

Hello,

She is required to fast, as it is established in the Shulchan Aruch (Orach Chaim 559:5) that pregnant and breastfeeding women fast on Tisha B'Av just as they fast and complete their fast on Yom Kippur.

This is, of course, assuming a healthy pregnancy. If not, one should consult with a doctor and a Halachic authority.

Best wishes,

Hillel Meirs