The previous NCI analysis had concluded that, while some question regarding an association between abortion and breast cancer existed prior to the mid-1990s, a number of large and well-regarded studies had resolved the issue in the negative.
之前NCI的分析得出的结论是，虽然在20世纪90年代中期之前存在一些关于堕胎与乳腺癌之间关联的疑问，但一些大型且备受推崇的研究已经解决了这个问题。