Britney Spears and Justin Timberlake dated for around three years (Picture: Getty)
The Toxic singer, 41, and SexyBack musician, 42, first met as children on the Mickey Mouse Club, before they started dating in 1999, when she was 17.
In the pages of her new memoir, The Woman In Me – which is released on October 24 – the pop icon opened up about becoming pregnant in 2000, during the height of their romance.
In an extract obtained by People Magazine, the former couple had a ‘conflicted’ discussion about whether to terminate the pregnancy.
‘But Justin definitely wasn’t happy about the pregnancy,’ she is thought to have penned.
‘He said we weren’t ready to have a baby in our lives, that we were way too young.’
Britney and Justin started dating in 1999(Picture: Getty)
According to TMZ, insiders also claimed Britney explained that she was raised not to get an abortion, and wanted to have Justin’s baby.
However, they went through some difficult discussions before eventually agreeing that a termination was the right decision.
The source said that this ‘haunted’ the Womanizer singer for years, and she would share this privately.
Justin has yet to speak publicly about the extract.
They made the difficult decision to terminate the pregnancy (Picture: WireImage)
The pair ended their relationship in 2002 after around three years of dating, with Britney moving on with Kevin Federline, who she welcomed sons Sean and Jayden with.
Elsewhere in the book, via People Magazine, she opened up about her time in the Mickey Mouse Club, revealing her connection with her now-ex was instant.
‘Being in the show was boot camp for the entertainment industry: extensive dance rehearsals, singing lessons, acting classes, time in the recording studio, and school in between,’ she wrote.
‘We looked up to the older kids – Keri Russell, Ryan Gosling, and Tony Lucca, who I thought was so handsome. And I quickly connected with a boy named Justin Timberlake.
‘[Once] at a sleepover, we played Truth or Dare, and someone dared Justin to kiss me. A Janet Jackson song was playing in the background as he leaned in and kissed me.’
Metro.co.uk has contacted Justin’s reps for a comment.
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They started dating in 1999.