If abortion were made illegal again, women would not return to coat-hanger abortions or back-alley butchers. Safe, modern technology will be available to non-physicians, and it would be relatively easy to get an abortion.
If abortion were illegal, well-intentioned but unskilled practitioners would perforate uteruses, misjudge the length of gestation, do incomplete abortions, and otherwise botch the procedure. Women's health would suffer and the death rate soar. Further, women would once more be forced to break the law to receive necessary medical care, and their dignity would be lost in the process. Also, this argument, by admitting that abortions would continue under anti-abortion laws, exposes the real goal behind recriminalizing abortion---to punish women.