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Blood group affects fertility
Women with type O blood may struggle to conceive due to lower egg quality and count, scientists have found
A woman’s ability to get pregnant may be influenced by her blood group, according to new research.
The US study of 560 women undergoing fertility treatment found that those with type O blood appeared to have a lower egg count and poorer egg quality than others, and could have more trouble conceiving as they age.
Approximately 44% of the population has type O blood, making it the most common blood group in the UK.
The researchers from Albert Einstein College of Medicine in New York and Yale University looked at the levels of a chemical called follicle-stimulating hormone (FSH) in women of an average age of 35.
A woman has a fixed number of eggs – known as her ‘ovarian reserve’ – which are released gradually over her fertile life. High levels of FSH are thought to be an indicator that this reserve is quickly diminishing, which can reduce chances of conception once a woman reaches her 30s and 40s.
Analysis of blood samples revealed that the women with type O blood were more likely to have higher FSH readings. Those with type A blood had significantly lower FSH levels.
Dr Edward Nejat, who led the study, said: ‘A woman’s age remains the most important factor in determining her success of conceiving.
Video: Blood Types and Paternity
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