Emma Willis let her friends watch a video of her giving birth.
The 43-year-old TV presenter - who has kids Isabelle, 10, Ace, seven, and Trixie, three, with her husband, Busted musician Matt Willis - allowed some parents-to-be look at the tape of her having a baby, in order to prepare them.
She told The Sun newspaper: "We have friends at the minute who are expecting their first baby and the mum doesn't want to find out the sex of the baby and the dad is obviously like, 'Come on'.
"I said, 'Watch the birth of Trixie and see if that will change your mind'.
"And he watched it, and when he hears Matt kind of choke up going, 'It's a girl', he was like, 'We're not finding out, I need that moment in my life of surprise'."
Meanwhile, Emma recently admitted she "probably" had PTSD after the birth of Isabelle because it was so traumatic.
Isabelle became stuck during the labour and her heartbeat dropped, resulting in a rotational forceps delivery having to be carried out which left Emma with injuries that took to heal.
She shared: "There was a lot of trauma afterwards. A lot of stitches. I couldn't sit down for 12 weeks."
Emma suffered a flashback to her own difficult delivery when she was filming scenes for her W television series 'Emma Willis: Delivering Babies' at the Princess Alexandra NHS hospital in Essex, England.
After witnessing a woman having a vaginal tear repaired it made her faint and she was urged by the maternity ward team to talk about her own frightening labour.
'The Voice' host said: "It was very much like looking at yourself, and my body's response was just total horror and I just hit the floor.
"It hadn't been great but I went, 'There are worse situations that could have happened.' "
When put to her that she could have had PTSD (posttraumatic stress disorder), Emma replied: "It probably was. But my default for PTSD goes to soldiers. Birth is such a common thing you don't think about it in those terms."
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