11/29/2014 08:09 EST | Updated 01/29/2015 05:59 EST

Ex-UPS driver, denied light duty while pregnant, presses discrimination claim at Supreme Court

WASHINGTON - Peggy Young only has to look at her 7-year-old daughter to be reminded how long she's been fighting with United Parcel Service over its treatment of pregnant employees — and why.

Young was pregnant when UPS told her she could not have a temporary assignment to avoid lifting heavy packages, as her doctor ordered.

Young recalls the sting of being told "basically to go home and come back when I was no longer pregnant."

She sued the package delivery company for discriminating against pregnant women. After she lost two rounds in lower courts, the Supreme Court will hear her case Wednesday.

Young says she's fighting for her two daughters and for other women who want to work and start a family.