Women have made enormous progress in many arenas, but there is still at least one taboo subject they simply don’t talk about enough: money.

Compared to men, women remain far more reluctant to talk about their finances, and it’s affecting their saving and investing. A new study released Thursday by Fidelity Investments reports that eight in 10 women have refrained from discussing money with family and friends, partly because the subject is “uncomfortable” or “too personal.”

And while 77 percent of the women in the survey said they would be comfortable discussing medical issues on their own with a doctor, just 47 percent said they feel confident when they talk about money and finances with a financial advisor or other financial professional.