Fertility: Type O reduces it
Women with this blood type were twice as likely to have blood levels of the hormone FSH high enough to indicate low ovarian reserve, a measure of fertility, according to an Albert Einstein College of Medicine study. Researchers couldn’t say for sure why, though. Given that type O blood is the most prevalent across all U.S. ethnicities, it doesn’t pay to worry too much about it. Age is a far more important risk factor for fertility problems.
