Michelle Obama, the former US first lady, has revealed that she used IVF treatment to conceive her two daughters Malia and Sasha after once suffering a miscarriage.

In a deeply personal interview, Mrs Obama, who is married to former US president Barack Obama, also made public that the pair had undergone marriage counselling.

Mrs Obama also said she would “never forgive” Donald Trump for endangering her family by escalating claims that her husband was not born in America, triggering a new row with the president.

The revelations were made both in her new memoir, Becoming, which will be published on Tuesday, and a promotional interview for the book she gave to ABC News.

They provide an intimate portrayal of a relationship that sat at the heart of the White House for eight years during Mr Obama’s presidency, which ended in January 2017.