If possible, you might consider visiting the Schlesinger Library at Harvard (Cambridge, MA) www.radcliffe.edu/schles or the Sophia Smith Collection at Smith College (Northampton, MA) www.smith.edu/libraries/libs/ssc Both are women's history libraries so they have primary sources for the research you're doing. For example, Schlesinger has the records of NARAL and Smith has the Margaret Sanger papers.

As for books and one useful website I found re: your AMA question, here you go. This is not a comprehensive list. The books' endnotes will provide additional sources for your research.

Abortion & the early church : Christian, Jewish & pagan attitudes in the Greco-Roman world / Michael J. Gorman.

Abortion and the politics of motherhood / Kristin Luker

Abortion in America : the origins and evolution of national policy, 1800-1900 / James C. Mohr.

Articulating life’s memory : U.S. medical rhetoric about abortion in the nineteenth century / Nathan Stormer.

Controlling reproduction : an American history / edited by Andrea Tone.

Encyclopedia of abortion in the United States / Louis J. Palmer, Jr.

Eve’s herbs : a history of contraception and abortion in the West / John M. Riddle.

Historical and multicultural encyclopedia of women’s reproductive rights in the United States / edited by Judith A. Baer.

The story of Jane : the legendary underground feminist abortion service / Laura Kaplan.

When abortion was a crime : women, medicine, and law in the United States, 1867-1973 / Leslie J. Reagan.

Reader’s Companion to American History – Abortion
college.hmco.com/history/readerscomp/rcah/html/ah_000400_abortion.htm