This video went viral in China last year, but it's making the rounds on social media again this week. What we have here is an ultrasound scan of identical twin girls who are only four months along and as you can tell from the video, they're already feuding. They appear to be kicking and even punching in the womb!
They shared the same amniotic sac and placenta, which is rare and risky...but they were both born safe and sound.
And because "The Internet", I couldn't help myself and had to make my own rendition of the video...