The Morrigan: That statistic isn't just something that was noticed in an unrelated study, it can be explained.
Within a few days after pregnancy, the corpus luteum, which is in a woman's ovary, begins to secrete large quantities of a number of hormones. One of those chemicals, estrogen, makes the breasts grow in preparation for nursing. In the early months of a first pregnancy, the breasts may be adult size, but the tissue is rather primitive. In other words, it's not specialized for producing milk. It's mostly able just to grow, to proliferate. Later in the pregnancy, the growth switch clicks off, and those cells differentiate into mature, milk-producing cells. Primitive cells, because they're programmed to grow, are more likely to be sensitive to carcinogenic stimuli. If a woman has an abortion, she's left with a large number of these immature cells lining her breast ducts, and she is thereforeeee more vulnerable to cancer down the road—30 percent more vulnerable.
White[icE]: Why would you keep a child? You already made the choice when you had sex. You're not supposed to choose whether to "keep the child" (read: let it retain its life) partway through its development.