Men from overseas, including Australia, are estimated to have fathered tens of thousands of children to sex workers in the Philippines. Now, thanks to DNA, the children are tracking them down. Watch the #4Corners documentary, Sex Tourism: My Father’s Secret, on ABC iview: ab.co/3LkkEb2

Vikki and her husband had to delay starting a family due to his prostate cancer diagnosis. They underwent IVF treatment, but two healthy embryos were destroyed by their fertility clinic. Watch the #4Corners documentary ‘When IVF goes wrong’ here: ab.co/3W3D85Z

Lexie and Anastasia Gunn wanted the same donor to conceive their three children but the IVF clinic used "the wrong sperm". Watch the Four Corners documentary ‘When IVF goes wrong’ at ABC iview now: ab.co/3VWRVzf

It was the best chance Vikki and Chris had in years to get pregnant. Then the IVF clinic destroyed their embryos. #4Corners ab.co/3LiCqfb

Katherine discovered her biological father was a prolific sperm donor. She could now have 700 siblings. ab.co/4cuZCSO #4Corners

Australia’s fertility industry is rapidly growing, dominated by corporate clinics making huge profits. Four Corners is investigating concerns of lost or destroyed embryos, lab errors and other problems. If you have a story to share, contact us at ab.co/4aUYkzS

Watch the #4Corners documentary, 'Rules of Engagement', now on ABC iview: ab.co/43u6b4N

Six years after whistleblower David McBride and ABC journalist Dan Oakes last spoke, they’re still grappling with the fallout from each other’s actions. What really happened with The Afghan Files: ab.co/3PByxEn #4Corners