The rate of premature births for twins is 80 percent; many are born underweight. Many organs, such as the lungs or optic nerves, may not have properly formed at birth. They require a lot of care.
由於雙胞胎早產的比例高達百分之八十，體重常過輕，再加上胎兒的諸多器官，如視神經、肺等尚未發育完全，照顧非常費心。