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The multi-billion dollar fertility industry brings joy to so many who need medical assistance to have a baby. But it's also described as the "Wild West" for a lack of regulation.

In the latest case to make headlines, twin sisters discovered they weren't biologically related to their parents following a DNA test. The woman they knew as mum had been implanted with the wrong embryos in an IVF mix-up 30 years ago in Sydney.

They're not alone. In this bonus episode of The Briefing, Natarsha Belling talks with Amelia Oberhardt, who investigated the fertility industry for her podcast Secrets We Keep: By Any Means

Follow The Briefing:
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See omnystudio.com/listener for privacy information.

BONUS: IVF mix-up: giving birth to a stranger’s baby