They're not stange bedfellows at all. First they wanted protection from the consequences of sexually irresponsible behavior (abortion) and now they want protection from the consequences of abortion (breast cancer research). It all makes perfect albeit macabre sense.
It has to do with complex and delicate hormonal actions that take place when a pregnancy has been violently or chemically stopped, and it has long term effects.
If that particular lid were really blown off the abortion issue, the babykillers would be hard pressed to prove that they actually give a damn about the "health of the mother".
Remember reading that women who had an abortion are more likely to develop breast cancer later. Interesting!
Here is an interesting link
http://www.abortionbreastcancer.com/start/
Note in the letter that the relationship is something they predicted:
"Readers of our e-newsletter, "Abortion-Breast Cancer News Headlines," could have easily predicted that the American Cancer Society (ACS) and Planned Parenthood would send letters to the editor objecting that abortion doesn't raise a woman's risk for breast cancer."