AMICI CURIAE BRIEF OF THE SERVICE WOMEN’S ACTION NETWORK, CALIFORNIA WOMEN LAWYERS, CENTER FOR REPRODUCTIVE RIGHTS, COLUMBIA LAW SCHOOL SEXUALITY AND GENDER LAW CLINIC, CONNECTICUT WOMEN’S EDUCATION AND LEGAL FUND, EQUAL RIGHTS ADVOCATES, LEGAL VOICE, MICHIGAN ASSOCIATION FOR JUSTICE, NATIONAL WOMEN’S LAW CENTER, AND THE WOMEN’S BAR ASSOCIATION OF THE DISTRICT OF COLUMBIA IN SUPPORT OF PLAINTIFFS-APPELLEES AND INTERVENOR PLAINTIFF APPELLEE