How long is shingles contagious to pregnant women?

Shingles is contagious from the time the rash appears until the blisters have crusted over. If a pregnant woman has never had chickenpox or the varicella vaccine, she can contract chickenpox from someone with shingles. However, if she has had chickenpox or the vaccine, she is not at risk. It's important for pregnant women to avoid exposure to shingles to prevent complications.