Complex sentence: Most anencephalic fetuses do not survive birth, accounting for 55% of non-aborted cases, and infants that are not stillborn will usually die within a few hours or days after birth from cardiorespiratory arrest.
Split into simpler sentences: Most anencephalic fetuses do not survive birth, accounting for 55% of non-aborted cases. Infants that are not stillborn will usually die within a few hours or days after birth from cardiorespiratory arrest.