What is the Process if you are Laining Meggilah for women only: Who makes the Bracha? Before and after? Can a person who has already heard be yotzeh the Women? Does it make a difference if it is Multiple women or one?
See: “Women’s Megillah Reading,” Aryeh A. Frimer, In “Traditions and Celebrations for the Bat Mitzvah,” Ora Wiskind Elper, Editor; Urim Publications: Jerusalem, 2003; pp. 281-304. PDF file available online at: http://mj.bu.edu/rsrc/MailJewish/MjReaderContributions/WomensMegillaReadingRev3.doc; HTML files available at http://www.lookstein.org/articles/women_megilla_reading.htm and http://www.daat.ac.il/daat/english/tfila/frimer2.htm.
To supplement, not supplant, R'Gershon Gold's answer, no one says a b'racha after a reading for women. (Source: Rama 692:1, q.v.)