There are a lot of links in posts 31 and 32 which state otherwise. You may want to e mail Dr. Angela Lanfranchi, MD, FACS, of the BCP institute for further facts.
Correlation does not imply causality. For example, all people eat food. All people die. Therefore, eating food must cause people to die. False. Breast cancer is caused by mutations of cells that the immune response cannot stop. It is ridiculous to think that an abortion, which causes a temporary but dramatic drop in hormones, suppresses the immune response.
The existence of a number of links does not prove anything. Lies and errors are repeated frequently-- ever heard of propaganda? Well-meaning people, including researchers, aren't always aware of their existing biases.
and what did Dr. Angela Lanfranchi say?