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Blood Type Linked to Earlier Decline in Fertility
A woman's blood type may yield clues to her fertility, a new study suggests. The results show that, of a group of women in their 30s who sought medical fertility help, those with blood type O were more likely than women with other blood types to have diminished ovarian reserve, meaning their ovaries had few eggs or had eggs unlikely to meet with success during in vitro fertilization procedures. Type O blood is the most common type in the United States.