That depends how one defines 'pro-choice'. Contrary to what the media claims, there is a continuum of views on the subject. While less than 10% of the population believes that abortion should be legal and unrestricted under any and all circumstances, an even smaller portion of the population would be willing to have outlawed any type of contraceptive or other drug that would have any chance of causing an egg to fail to implant.
Whether you regard their views as consistent or contradictory, many voters favor legislation that would protect embryos or fetuses past a certain age of gestation (different voters put the line different places, but many would put it quite early, and some to nearly the moment of implantation) and yet strongly oppose any legislation which would restrict access to contraceptives.
If Republicans were smart, they would seek to court those in the middle. While this would require them to "soften" their positions, such a softening would not represent appeasement since it would actually help move the status quo in their direction. Unfortunately, ever since 1996 I've found myself losing confidence in the Republican Party's intelligence.
Hydrocephaly, the most common condition that causes such swelling of a baby's head, is normally delivered C-section and I have never heard of such surgery being LIKELY to leave a woman sterile. C-sections are very common.
And I repeat, partial birth abortion is NEVER necessary to save a mother's life.