| http://www.w3.org/ns/prov#value | - es of having twins and other multiple births, and raise risks to both mother and babies, including diabetes during pregnancy, premature birth and cerebral palsy.But improved technology has helped increase births if single embryos are used in younger women judged to have a good chance of getting pregnant, said Jessica Kresowik at the University of Iowa in Iowa City, who led the study.In the past,
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