Melania Trump made an extraordinary declaration in an eagerly awaited memoir to be published a month from election day: she is a passionate supporter of a woman’s right to control her own body – including the right to abortion.

“It is imperative to guarantee that women have autonomy in deciding their preference of having children, based on their own convictions, free from any intervention or pressure from the government,” the Republican nominee’s wife writes, amid a campaign in which Donald Trump’s threats to women’s reproductive rights have played a central role.

“Why should anyone other than the woman herself have the power to determine what she does with her own body? A woman’s fundamental right of individual liberty, to her own life, grants her the authority to terminate her pregnancy if she wishes.

“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.”

Melania Trump has rarely expressed political views in public. Her book, Melania, which reveals the former first lady to be so firmly out of step with most of her own party, will be published in the US next Tuesday. The Guardian obtained a copy.

Her decision to include a full-throated expression of support for abortion rights is remarkable not just given her proximity to a Republican candidate running on an anti-abortion platform, but also given the severe deterioration of women’s reproductive rights under Donald Trump and the GOP.

In 2022, in the supreme court case Dobbs v Jackson, three justices installed when Donald Trump was president voted to strike down Roe v Wade, the ruling which had protected federal abortion rights since 1973. Republican-run states have since instituted draconian abortion bans.

Donald Trump has tried to both take credit for the Dobbs decision – long the central aim of evangelical and conservative Catholic donors and voters – and avoid the fury it has stoked, saying abortion rights should be decided by the states.

But Democrats have scored a succession of election wins by campaigning on the issue, even in conservative states, and threats to reproductive rights, among them threats to fertility treatments including IVF, are proving problematic for Republicans up and down this year’s ticket.

Amid a blizzard of statements opponents deem misogynistic and regressive, JD Vance, Donald Trump’s pick for vice-president, has indicated he would support a national abortion ban – a move it seems his boss’s wife would be against.

Donald Trump himself recently got into a tangle over whether he would vote in November to protect abortion rights in Florida, a ballot his wife will also cast given their residence at Mar-a-Lago in Palm Beach. He eventually said he would vote no. Judging by her own words, Melania Trump appears likely to vote yes.

Her memoir is slim, long on descriptions of her youth in Slovenia, life as a model in New York and love for the man whose third wife she became, correspondingly short on policy discussion. Donald Trump provides a blurb, praising his wife’s “commitment to excellence … insightful perspective … [and] entrepreneurial achievements”.

Before discussing abortion, Melania Trump says she disagreed with her husband on some aspects of immigration policy, not least as an immigrant herself.

“Occasional political disagreements between me and my husband,” she writes, are “part of our relationship, but I believed in addressing them privately rather than publicly challenging him.”

And yet, later in her book, she states views on abortion and reproductive rights diametrically opposed to those of her husband and his party.

“I have always believed it is critical for people to take care of themselves first,” Melania Trump writes. “It’s a very straightforward concept; in fact, we are all born with a set of fundamental rights, including the right to enjoy our lives. We are all entitled to maintain a gratifying and dignified existence.

“This common-sense approach applies to a woman’s natural right to make decisions about her own body and health.”

Trump says her beliefs about abortion rights spring from “a core set of principles”, at the heart of which sit “individual liberty” and “personal freedom”, on which there is “no room for negotiation”.

Detailing “legitimate reasons for a woman to choose to have an abortion”, she includes danger to the life of the mother, rape or incest, often exceptions under state bans, and also “a congenital birth defect, plus severe medical conditions”.

Saying “timing matters”, Melania Trump also defends the right to abortion later in pregnancy.

She writes: “It is important to note that historically, most abortions conducted during the later stages of pregnancy were the result of severe fetal abnormalities that probably would have led to the death or stillbirth of the child. Perhaps even the death of the mother. These cases were extremely rare and typically occurred after several consultations between the woman and her doctor. As a community, we should embrace these common-sense standards. Again, timing matters.”

More than 90% of US abortions occur at or before 13 weeks of gestation, according to data from the CDC. Less than 1% of abortions take place at or after 21 weeks.

On the campaign trail, Republicans have blatantly mischaracterized Democratic positions on abortion. Last month, debating Kamala Harris, Donald Trump falsely said his opponent’s “vice-presidential pick … says that abortion in the ninth month is absolutely fine. [Tim Walz] also says: ‘Execution after birth’ – execution, no longer abortion because the baby is born – is OK.”

He was factchecked: it is not legal in any state to kill a baby after birth.

In response to news of Melania Trump’s support for abortion rights, Sarafina Chitika, a spokesperson for the Harris-Walz campaign, said in a statement: “Sadly for the women across America, Mrs Trump’s husband firmly disagrees with her and is the reason that more than one in three American women live under a Trump Abortion Ban that threatens their health, their freedom, and their lives.

“Donald Trump has made it abundantly clear: if he wins in November, he will ban abortion nationwide, punish women, and restrict women’s access to reproductive health care.”

The Trump campaign did not immediately comment.

On social media, Melania Trump doubled down, posting a short video in which she paraphrased remarks in her book.

On the page, Melania Trump issues a distinctly un-Trumpian appeal for empathy.

“Many women opt for abortions due to personal medical concerns,” she writes. “These situations with significant moral implications weigh heavily on the woman and her family and deserve our empathy. Consider, for example, the complexity inherent in the decision of whether the mother should risk her own life to give birth.”

Recent reporting has highlighted cases of women who have died in states where abortion has been banned.

She goes on to appeal for compassion.

“When confronted with an unexpected pregnancy, young women frequently experience feelings of isolation and significant stress. I, like most Americans, am in favor of the requirement that juveniles obtain parental consent before undergoing an abortion. I realize this may not always be possible. Our next generation must be provided with knowledge, security, safety, and solace, and the cultural stigma associated with abortion must be lifted,” writes the former first lady.

Finally, Melania Trump offers an expression of solidarity with protesters for reproductive rights.

“The slogan ‘My Body, My Choice’ is typically associated with women activists and those who align with the pro-choice side of the debate,” she writes. “But if you really think about it, ‘My Body, My Choice’ applies to both sides – a woman’s right to make an independent decision involving her own body, including the right to choose life. Personal freedom.”