Under the PWFA, an employer must accommodate a worker's known limitation related to pregnancy, childbirth, or related medical conditions, absent undue hardship. Pregnancy discrimination is illegal under New York, New Jersey and Pennsylvania state and federal laws.This document provides guidance regarding the Pregnancy Discrimination Act and the Americans with Disabilities Act as they apply to pregnant workers. One of the most powerful ways that our New Jersey pregnancy discrimination lawyers prove pregnancy discrimination is through a timeline. Pregnancy discrimination refers to any unfavorable treatment of pregnant employees in the workplace due to their pregnancy or related medical conditions. Middlesex County Bar Association. Attridge Law and Steve Law Judgment of the ECJ 17.