"Considering all the wars and all the rape and robbery that occurred … I know I cannot prove that I was not part of a product of that," King said. "I would like to think that each of our lives is as important as any other life," he added.
Comments came as the King argued that exceptions for abortion were not allowed in cases of rape or incident.
The Iowa Republican is a controversial and polarizing figure on Capitol Hill with a track record of making racist comments that have generated backlash across the political spectrum.
CNN has been reached. went to King's office for comment, but did not immediately receive a response.
Democratic presidential candidates also quickly denounced the congressman, including New York Sen. Kirsten Gillibrand has called for his resignation.
"Iowans have long deserved better than Steve King and his hateful, insulting words. He should resign, "tweeted Democratic Senator Cory Booker of New Jersey.
This story was updated with further developments on Wednesday.