Has anyone seen this? Its a National Geographic special that uses 4d ultrasound technology to get remarkable footage of twins, triplets and quads in utero. You can see the babies snuggling together, touching each other, and kicking each other, etc.
https://shop.nationalgeographic.com/text/content/videoclips/VC_itw_multiples.htm
Re: Remarkable DVD: Multiples in the Womb
Actually, Amazon has better information:
https://www.amazon.com/gp/product/B000N6UF1K
I'm totally ordering it.