I came across a research study claiming there was a link between women with O blood types and a low egg reserve. While there isnt enough data to claim a link between blood type and infertility, it is a likely possibility. I have been diagnosed with unexplained infertility, and ironically am O+. When I go in for my consultation, I want to ask my doctor about this study and her thoughts on it, but out of personal curiosity, if you're struggling with infertility, what is your blood type?