However this story caught the attention of Bernie Sanders supporter Meagan Day on Twitter and Jeryl Bier at The Script this week, who both pointed out she told a very different story in 2007. And if Warren had been forced out of the job because she was pregnant, it's not likely school officials would have said so publicly.
"In April of that year, my contract was renewed to teach again for the next year", Warren said. The Massachusetts senator had said earlier this year that her decision to forgo expensive fundraisers only applied to the Democratic nominating contest.
"By the end of the first year, I was visibly pregnant, and the principal did what principals did in those days".
The "showed me the door" anecdote came up often on the campaign trail until recently.
PolitiFact went back to her past and present comments, and reviewed publicly available documents on the matter.
Warren, who does not hold private fundraisers and has raised her money in the primary through small donor donations, raised $24.6 million in the last financial quarter from 940,000 donations, second only to Vermont Sen.
During an interview with CBS News' Zak Hudak, Warren was asked "Do you wonder if perhaps you would pivot to having big-dollar fundraisers in the general election, or be forced to do that, can you continue doing what you are doing?"
"I was married at nineteen and graduated from college after I'd married, and my first year post-graduation I worked in a public school system with the children with disabilities".
"Then that summer, I actually didn't have the education courses, so I was on an emergency certificate, it was called, and I went back to graduate school and took a couple of courses in education and said, 'I don't think this is going to work out for me, '" Ms. Warren said in the interview on University of California Television. But personal experience tells us what most likely happened to her. "After becoming a public figure I opened up more about different pieces in my life and this was one of them".
The questions arose when reporters made a decision to dig into the story and verify some of the circumstances surrounding Warren's departure from the school. Regardless, the school board offered to renew her job. "Minutes from a board meeting held two months later, on June 16, 1971, indicate that Warren's resignation was 'accepted with regret'".
The CBS report also noted that stories from the local Paterson News reported that Warren had left her role "to raise a family".
A Washington Free Beacon story published Monday also raised questions about Warren's story. In this case, getting fired for being pregnant would cast Warren in the role of victim, a show of weakness many a career-minded women would want to avoid.
"My mom was demoted and then fired from her job when she was pregnant with my sis and me (we're twins)", Sarah said. The issue became the subject of a 1974 Supreme Court decision, which determined that mandatory maternity leaves requiring pregnant teachers to leave their job after the fourth month of pregnancy were unconstitutional. "Now, if you didn't tell anybody you were pregnant, and they didn't know, you could fudge it and try to stay on a little bit longer", one teacher, Trudy Randall, said. "But they kind of wanted you out if you were pregnant".