This one happened yesterday to my wife's best friend.
She worked for a facility that provides education for young adults with special needs. They work with severe handicaps as well, and the child she was with frequently lashes out, kicks, spits, etc. She loved the job though, and by all indications they loved the work she did since she started last summer.
Until she became pregnant. Once she advised them she was pregnant, management became cold and callous towards her. She would be lectured for going to the bathroom, scolded for being late from a doctor's appointment, etc.
Monday, her doctor put her on restrictions that provided no lifting above 15 pounds (she would frequently lift children in and out of wheelchairs) and to avoid working with students that might potentially kick her in the stomach, as she has a history of miscarriage. She presented these restrictions to management yesterday morning.
An hour later, they called her into the office and said that they could not work around these restrictions, terminated her, and welcomed her to come back “after your pregnancy has ended”.
Needless to say, she won't be returning, and has already filed for unemployment.