"As a result, Stupak/Pitts can be expected to move the industry away from current norms of coverage for medically indicated abortions. In combination with the Hyde Amendment, Stupak/Pitts will impose a coverage exclusion for medically indicated abortions on such a widespread basis that the health benefit services industry can be expected to recalibrate product design downward across the board in order to accommodate the exclusion in selected markets."
Furthermore the study finds that the supposed fallback option for impacted women--a "rider" policy that provides supplemental coverage for abortions only--may not even be allowed under the terms of the law. "In our view, the terms and impact of the Amendment will work to defeat the development of a supplemental coverage market for medically indicated abortions. In any supplemental coverage arrangement, it is essential that the supplemental coverage be administered in conjunction with basic coverage. This intertwined administration approach is barred under Stupak/Pitts because of the prohibition against financial comingling."
The authors also note that though the direct impact of the Stupak amendment on women who receive insurance from their employers will be initially minimal, the provision's tentacles could nonetheless reach into the employer-provided insurance market, too, "further driv[ing] the industry to shift away from current abortion coverage norms and toward product designs that meet exchange and Hyde Amendment requirements."
You can read the entire report here.