The idea behind the buttons is that not all pregnancies are easily visible, which can make it difficult for other riders to determine whether to offer up their seat, CTA said in a release statement.
The buttons are intended to make it easier for pregnant riders to seek a seat.
Picking up a button in the lobby of CTA's headquarters at 567 W. Lake Street
Visit any of these five participating local hospitals: Northwestern Medicine Prentice Women's Hospital, University of Chicago Medicine, Rush University Medical Center, St. Anthony Hospital and John H. Stroger, Jr. Hospital of Cook County