A woman's blood group could influence her chances of getting pregnant, scientists have found. Those with blood type O may struggle to conceive due to a lower egg count and poorer egg quality, while those with blood group A seem to be more fertile.

What blood type has difficulty getting pregnant?

Blood Type O Linked to Fertility Problems. Oct. 25, 2010 -- Researchers say having type O blood can affect a woman's chances of getting pregnant.

Does blood type determine fertility?

A woman's ability to conceive in early middle age may be influenced by her blood type, according to research. The US study of 560 women undergoing fertility treatment found that those with type "O" blood had chemical signs linked to low egg numbers.