Do all jobs turn down pregnant woman?

Shawna
I sent my resume out for a desk job, went to the interview and they wouldn't hire me because I am pregnant. 
Why? I am very capable of working just like any other person pregnant or not. It is so frustrating, I'm just another woman out there trying to find work to provide for herself and her babies. 
Is there any good places or suggestions any one has for work, for a pregnant woman ?