"Why should anyone other than the woman herself have the power to determine what she does with her own body?" Melania Trump writes in her memoir that is due to be published four weeks before the November 5 election, in which her husband faces Democrat Kamala Harris.
"Restricting a woman's right to choose whether to terminate an unwanted pregnancy is the same as denying her control over her own body. I have carried this belief with me throughout my entire adult life," she was reported as writing in the memoir.
The Guardian on Wednesday said it has obtained a copy of the book, titled Melania, due to be published on October 8. A spokesperson for the former first lady did not immediately respond to a request for comment from Reuters.
Donald Trump, a Republican, had previously signalled support for a national ban beyond 15 weeks of pregnancy but in April said political considerations were paramount in the first presidential election since the US Supreme Court overturned the landmark 1973 Roe vs Wade decision, ending a nearly 50-year federal right to the procedure.
Trump says abortion laws should be decided by the states and backs exceptions to a ban on abortion in the case of rape, incest and to protect the mother's life.
Polls show the presidential election is a tight race with seven battleground states likely to decide the outcome.
Democrats see abortion rights as a popular issue for Harris to use against Trump. A Reuters/Ipsos poll conducted from August 21-28 found a majority of voters, including 34 per cent of Republicans, want the next president to protect or increase abortion access.
Trump takes credit for the Supreme Court overturning the Roe vs Wade decision in 2022, which had protected a right to abortion at up to around 24 to 28 weeks, because justices appointed by Trump swung the vote.
