There is strong evidence that abortion increases the risk of breast cancer. A study of more than 1,800 women appearing in the Journal of the National Cancer Institute in 1994 found that overall, women having abortions increased their risk of getting breast cancer before age 45 by 50%. For women under 18 with no previous pregnancies, having an abortion after the 8th week increased the risk of breast cancer 800%. Women with a family history of breast cancer fared even worse. All 12 women participating in the study who had abortions before 18 and had a family history of breast cancer themselves got cancer before age 45.
Of course, the death of the mother is the most serious of all complications. Over 200 women have died from legal abortions since 1973. The risk of death increases according to the duration of pregnancy and the complexity of the abortion technique employed.